Hinge assembly and foldable electronic device including same

Abstract

Disclosed is an electronic device comprising: at least one hinge assembly (240, 240-1); a first housing (210); and a second housing (220). The at least one hinge assembly comprises: a first arm member (410, 410a, 410b) including a first slit (435, 435a, 435b) formed between a first extension portion and a second extension portion; a second arm member (420, 420a, 420b) including a second slit (455, 455a, 455b) formed between a third extension portion and a fourth extension portion; a first bracket (810) comprising a first area (811) disposed in the first slit, and a second area (813) disposed in the second slit; a first elastic member (111) configured to press the second extension portion; and a second elastic member (112) configured to press the fourth extension portion. The first area is in close contact with the first extension portion and the second extension portion, and the second area is in close contact with the third extension portion and the fourth extension portion.

Description

Hinge assembly and foldable electronic device including the same

[0001] The embodiments disclosed in this document relate to a hinge assembly and a foldable electronic device including the same.

[0002] A foldable electronic device may be configured to have various folding angles to provide a variety of usage environments to the user. For example, the foldable electronic device may include at least one hinge assembly, and a folded state in which two housings form a predetermined angle centered on the hinge assembly may be maintained. For example, in the folded state, a first display screen (e.g., a video playback screen) may be displayed in a display area located on one side of the hinge assembly, and a second display screen (e.g., an internet search screen) may be displayed in a display area located on the other side of the hinge assembly. To stably maintain the folded state, the foldable electronic device may include various friction structures.

[0003] The information described above may be provided as related art for the purpose of aiding understanding of the present disclosure. No claim or determination is made as to whether any of the foregoing may be applied as prior art in relation to the present disclosure.

[0004] An electronic device according to one embodiment disclosed in this document may include at least one hinge assembly (240, 240-1), a first housing (210) coupled to one side of the at least one hinge assembly, and a second housing (220) coupled to the other side of the at least one hinge assembly. The at least one hinge assembly comprises: a first arm member (410, 410a, 410b) including a first arm body (414, 414a, 414b) coupled to the first housing, a first extension portion (431, 431a, 431b) extending from the first arm body, a second extension portion (433, 433a, 433b) extending from the first arm body and formed parallel to the first extension portion, and a first slit (435, 435a, 435b) formed between the first extension portion and the second extension portion; a second arm body (424, 424a, 424b) coupled to the second housing, a third extension portion (451, 451a, 451b) extending from the second arm body, and a fourth extension extending from the second arm body and formed parallel to the third extension portion. It may include a second arm member (420, 420a, 420b) comprising a portion (453, 453a, 453b) and a second slit (455, 455a, 455b) formed between the third extension portion and the fourth extension portion, a first bracket (810) comprising a first region (811) disposed in the first slit, a second region (813) disposed in the second slit, and a region (815, 817) connecting the first region and the second region, a first elastic member (111) configured to press the second extension portion in a direction toward the first region, and a second elastic member (112) configured to press the fourth extension portion in a direction toward the second region. The first region may be in close contact with the first extension portion and the second extension portion by the pressure of the first elastic member.The second region above can be in close contact with the third extension part and the fourth extension part by the pressure of the second elastic member.

[0005] A hinge assembly according to one embodiment disclosed in this document comprises: a first arm member (410, 410a, 410b) including a first arm body (414, 414a, 414b), a first extension portion (431, 431a, 431b) extending from the first arm body, a second extension portion (433, 433a, 433b) extending from the first arm body and formed parallel to the first extension portion, and a first slit (435, 435a, 435b) formed between the first extension portion and the second extension portion; a second arm body (424, 424a, 424b); a third extension portion (451, 451a, 451b) extending from the second arm body; and a fourth extension portion (453) extending from the second arm body and formed parallel to the third extension portion. It may include a second arm member (420, 420a, 420b) comprising a third extension portion and a fourth extension portion, a first area (811) disposed in the first slit, a second area (813) disposed in the second slit, and an area (815, 817) connecting the first area and the second area, a first elastic member (111) configured to press the second extension portion in a direction toward the first area, and a second elastic member (112) configured to press the fourth extension portion in a direction toward the second area. The first region may be in close contact with the first extension portion and the second extension portion by the pressure of the first elastic member, and the second region may be in close contact with the third extension portion and the fourth extension portion by the pressure of the second elastic member.

[0006] FIG. 1 is a front perspective view of an electronic device in an unfolded state according to one embodiment.

[0007] FIG. 2 is a side perspective view of an electronic device in a folded state according to one embodiment.

[0008] FIG. 3 is a partially exploded perspective view of an electronic device in an unfolded state and a side perspective view of an electronic device in an unfolded state according to one embodiment.

[0009] FIG. 4 is a partially exploded perspective view of the electronic device of FIG. 1 to 3 including a hinge assembly according to one embodiment.

[0010] FIG. 5 is a perspective view showing an example of a hinge assembly of an electronic device according to one embodiment.

[0011] FIG. 6 is a perspective view showing an example of a configuration that generates frictional force of a hinge assembly according to one embodiment.

[0012] FIG. 7 is an exploded perspective view showing an example of a hinge assembly according to one embodiment.

[0013] FIG. 8 is a drawing showing an example of a first arm member of a hinge assembly according to one embodiment.

[0014] FIG. 9 is a drawing showing an example of a first arm member having a first slit formed therein, according to one embodiment.

[0015] FIG. 10 is a drawing showing an example of a second arm member of a hinge assembly according to one embodiment.

[0016] FIG. 11 is a drawing showing an example of a first bracket of a hinge assembly according to one embodiment.

[0017] FIG. 12 is a drawing showing an example of a combined form of a first arm member and a first bracket according to one embodiment.

[0018] FIG. 13 is a drawing illustrating an example of a second extension portion of a first arm member being bent according to one embodiment.

[0019] FIG. 14 is a drawing illustrating an example in which a second extension portion is welded to a first arm member according to one embodiment.

[0020] FIG. 15 is a drawing showing an example of a first arm member of a hinge assembly according to one embodiment.

[0021] FIG. 16 is a drawing showing an example of a second extension portion of a first arm member according to one embodiment.

[0022] FIG. 17 is a drawing showing an example of a combined form of a first arm member and a second extension part according to one embodiment.

[0023] FIG. 18 is a drawing for explaining an example of a method in which a second extension portion is coupled to a first arm member according to one embodiment.

[0024] FIG. 19 is a drawing illustrating an example of a second extension part bending according to one embodiment.

[0025] FIG. 20 is a drawing showing an example of a first arm member of a hinge assembly according to one embodiment.

[0026] FIG. 21 is a drawing showing an example of a second extension portion of a first arm member according to one embodiment.

[0027] FIG. 22 is a drawing for explaining how an example of a second extension part moves according to one embodiment.

[0028] FIG. 23 is a drawing showing an example of a form of utilization of an electronic device according to one embodiment.

[0029] FIG. 24 is a drawing showing an example of a hinge assembly in an unfolded state of an electronic device according to one embodiment.

[0030] FIG. 25 is a drawing showing an example of a hinge assembly in a partially folded state of an electronic device according to one embodiment.

[0031] FIG. 26 is a drawing showing an example of a hinge assembly in a fully folded state of an electronic device according to one embodiment.

[0032] In relation to the description of the drawings, the same or similar reference numerals may be used for identical or similar components.

[0033] Hereinafter, various embodiments of the present invention are described with reference to the accompanying drawings. However, this is not intended to limit the present invention to specific embodiments and should be understood to include various modifications, equivalents, and / or alternatives of the embodiments of the present invention.

[0034] An electronic device according to one embodiment disclosed in this document is a foldable electronic device formed to be foldable around at least one hinge assembly, and may include an electronic device such as a smartphone, tablet, or laptop. The hinge assembly of the electronic device according to one embodiment may include a plurality of components that interlock organically to enable natural movement during the folding and / or unfolding process of the electronic device.

[0035] An electronic device according to one embodiment may include components that generate frictional force to maintain the folding angle of the electronic device. For example, the electronic device may include a structure in which at least one slit is formed (e.g., the first arm member (410) and the second arm member (420) of FIG. 5) and at least one bracket (e.g., the first bracket (810) of FIG. 5) that is fitted into and coupled to the slit. Due to the frictional force between the bracket and the slit, the electronic device may maintain a folded state at a specific angle, and various usage environments may be provided.

[0036] Various purposes and effects provided by an electronic device including an improved hinge assembly according to various embodiments may be mentioned with reference to the embodiments of the detailed description.

[0037] FIG. 1 is a front perspective view of an electronic device in an unfolded state according to one embodiment. Reference numeral 101 of FIG. 1 is a plan view showing the front of the electronic device (200), and reference numeral 102 is a perspective view looking obliquely at the front of the electronic device (200).

[0038] FIG. 2 is a side perspective view of an electronic device in a folded state according to one embodiment. FIG. 2 shows a side view of an electronic device (200) in an in-folding state.

[0039] FIG. 3 is a partially exploded perspective view of an electronic device in an unfolded state and a side perspective view of an electronic device in an unfolded state according to one embodiment. Reference numeral 301 of FIG. 3 indicates hinge assemblies arranged toward the front of the electronic device (200), and reference numeral 302 is a plan view showing the side of the electronic device (200).

[0040] Referring to FIGS. 1 to 3, in one embodiment, the electronic device (200) may include a first housing (210) (or, inner housing), a first hinge portion (240), a second housing (220) (or, sub-housing), a second hinge portion (250), and a third housing (230) (or, main housing). The first housing (210) and the second housing (220) may be foldably coupled to the first hinge portion (240). The second housing (220) and the third housing (230) may be foldably coupled to the second hinge portion (250). The first hinge portion (240) may include a first folding axis (F1), and the second hinge portion (250) may include a second folding axis (F2). For example, the first housing (210) may be folded or unfolded relative to the second housing (220) with respect to the first folding axis (F1). For example, the third housing (230) may be folded or unfolded relative to the second housing (220) with respect to the second folding axis (F2).

[0041] The first housing (210), the second housing (220), and the third housing (230) may not deform during folding (e.g., folding) and unfolding (e.g., unfolding) of the electronic device (200). The first hinge portion (240) and the second hinge portion (250) may include at least one hinge assembly driven to move the housings (e.g., the first housing (210), the second housing (220), and the third housing (230)) relative to each other during folding and unfolding of the electronic device (200).

[0042] In one embodiment, the first housing (210) may include a first surface (211) forming part of the front of the electronic device (200), a second surface (212) forming part of the rear of the electronic device (200), and a first side member (213) forming part of the side of the electronic device (200). The second housing (220) may include a third surface (221) forming part of the front of the electronic device (200), a fourth surface (222) forming part of the rear of the electronic device (200), and a second side member (223) forming part of the side of the electronic device (200). The third housing (230) may include a fifth surface (231) forming part of the front of the electronic device (200), a sixth surface (232) forming part of the rear of the electronic device (200), and a third side member (233) forming part of the side of the electronic device (200).

[0043] The front surface (211, 221, 231) of the electronic device (200) may be a plate in which at least a portion is substantially transparent (e.g., a glass plate containing various coating layers, or a polymer plate). The rear surface (212, 222, 232) of the electronic device (200) may be a plate in which at least a portion is transparent, or a plate in which it is substantially opaque. For example, the opaque plate may be formed of coated or colored glass, ceramic, polymer metal (e.g., aluminum, stainless steel (STS), or magnesium), fabric, leather, or a combination of at least two of the above materials. The side surface (213, 223, 233) of the electronic device (200) may comprise metal and / or polymer.

[0044] The electronic device (200) can be folded or unfolded continuously. For example, if the electronic device (200) corresponds to an infolding type, the first housing (210) can be folded over the second housing (220) along the first folding axis (F1), and then the third housing (230) can be folded over the first housing (210) along the second folding axis (F2). Alternatively, for example, if the electronic device (200) corresponds to an outfolding type, the first housing (210) can be folded under the second housing (220) along the first folding axis (F1), and then the third housing (230) can be folded under the first housing (210) along the second folding axis (F2). Alternatively, for example, if the electronic device (200) corresponds to an in-and-out folding type, the first housing (210) can be folded over the second housing (220) with respect to the first folding axis (F1), and then the third housing (230) can be folded under the second housing (220) with respect to the second folding axis (F2). The folding direction of each housing of the electronic device (200) (e.g., first housing (210), second housing (220), third housing (230)) is not limited to the above description and can be implemented in various combinations; for convenience of explanation, the following description will focus on the in-folding type electronic device (200).

[0045] In one embodiment, the first display (203) may be visible from the outside through at least a portion of the front surface (211, 221, 231) of the electronic device (200). In one embodiment, the first display (203) (e.g., a flexible display) may include a first area (203a) (e.g., a first flat surface), a second area (203b) (e.g., a second flat surface), a third area (203d) (e.g., a flexible surface), a fourth area (203c) (e.g., a third flat surface), and a fifth area (203e) (e.g., a flexible surface). For example, the first area (203a) may correspond to at least a portion of the first surface (211). The second area (203b) may correspond to at least a portion of the third surface (221). The third region (203d) connects the first region (203a) and the second region (203b) and can be deformed in the folded state of the electronic device (200). The fourth region (203c) may correspond to at least a portion of the fifth surface (231). The fifth region (203e) connects the second region (203b) and the fourth region (203c) and can be deformed in the folded state of the electronic device (200). In one embodiment, the portion drawn with a dotted line between the first housing (210) and the second housing (220) and the portion drawn with a dotted line between the second housing (220) and the third housing (230) may represent the bending region of the electronic device (200).

[0046] In one embodiment, a separate display (not shown) may be placed on a part of the rear surface (212, 222, 232) of the electronic device (200). For example, when the electronic device (200) is in a folded state, a separate display (not shown) may be visible through one side of the rear surface (212, 222, 232) facing the outside of the electronic device (200).

[0047] In one embodiment, the electronic device (200) may include an unfolded state in which a first housing (210), a second housing (220), and a third housing (230) are arranged side by side, a fully folded state in which the first housing (210) and the third housing (230) are sequentially folded with respect to the second housing (220), and a partially folded state in which the first housing (210) and the third housing (230) each form a predetermined angle with respect to the second housing (220). For example, one example of the unfolded state is illustrated in FIG. 1 and FIG. 3, one example of the fully folded state is illustrated in FIG. 2, and one example of the partially folded state is illustrated in FIG. 23.

[0048] In one embodiment, the widths of the first hinge portion (240) and the second hinge portion (250) may be determined according to the folding method of the electronic device (200). For example, when the electronic device (200) is configured such that the first housing (210) and the third housing (230) are folded sequentially with respect to the second housing (220), the second hinge portion (250), which covers a relatively long travel distance, may be formed larger than the first hinge portion (240). For example, the width in the x-axis direction of the second hinge portion (250) may be formed larger than the width in the x-axis direction of the first hinge portion (240). As an example, in the above case, the fifth area (203e) may be formed larger than the third area (203d) of the first display (203).

[0049] FIG. 4 is a partially exploded perspective view of the electronic device of FIG. 1 to 3 including a hinge assembly according to one embodiment.

[0050] Referring to FIGS. 1 to 4, in one embodiment, the electronic device (200) may include at least one hinge assembly (240, 240-1) (e.g., hinge structure, hinge module, or hinge device) connecting a first housing (210) and a second housing (220) below a first display (203) (e.g., in the -z axis direction) and at least one hinge assembly (250, 250-1) connecting the second housing (220) and a third housing (230). For example, at least one hinge assembly (240, 240-1) connecting the first housing (210) and the second housing (220) may include the first hinge assembly (240) and a second hinge assembly (240-1) spaced apart from the first hinge assembly (240) along a direction parallel to the first folding axis (F1) (e.g., ± y-axis direction). For example, at least one hinge assembly (250, 250-1) connecting the second housing (220) and the third housing (230) may include the third hinge assembly (250) and a fourth hinge assembly (250-1) spaced apart from the third hinge assembly (250) along a direction parallel to the second folding axis (F2) (e.g., ± y-axis direction). The first hinge assembly (240) and the second hinge assembly (240-1) may correspond to the first hinge portion (240) of FIGS. 1 to 3, and the third hinge assembly (250) and the fourth hinge assembly (250-1) may correspond to the second hinge portion (250) of FIGS. 1 to 3.

[0051] The first hinge assembly (240) and the second hinge assembly (240-1) may be positioned between the first housing (210) and the second housing (220) so as not to be seen from the outside through the first hinge housing (270) (e.g., the first hinge cover). The third hinge assembly (250) and the fourth hinge assembly (250-1) may be positioned between the second housing (220) and the third housing (230) so as not to be seen from the outside through the second hinge housing (280) (e.g., the second hinge cover).

[0052] When the electronic device (200) is in a folded state, it can support securing a folding curvature that prevents cracking or buckling from occurring in the folding area of ​​the first display (203) by forming the folding area (e.g., the third area (203d) and the fifth area (203e) of FIG. 1) (e.g., folding area) of the first display (203) into a gravity-actuated teardrop shape (e.g., dumbbell shape). Additionally, by placing the dumbbell-shaped display folding area within a certain space of the housings (210, 220, 230), the gap between the housings (210, 220, 230) can be reduced so that they are positioned facing each other and have an 11-shaped arrangement when the electronic device (200) is in a folded state. By doing so, the electronic device (200) can reduce the overall size of the electronic device (200) by reducing the gap between the housings (210, 220, 230) in a folded state, and can block or reduce the inflow of foreign matter between the housings (210, 220, 230).

[0053] According to one embodiment, the electronic device (200) may include a first center bar (243) disposed between the plane formed by the first hinge assembly (240) and the second hinge assembly (240-1) and the first display (203). The electronic device (200) may include a second center bar (253) disposed between the plane formed by the third hinge assembly (250) and the fourth hinge assembly (250-1) and the first display (203). The first center bar (243) may be disposed to cover at least a portion of the center area of ​​at least one of the first hinge assembly (240) and the second hinge assembly (240-1). As an example, the first center bar (243) may be disposed to cover at least a portion of the center area of ​​each of the first hinge assembly (240) and the second hinge assembly (240-1). The second center bar (253) may be positioned to cover at least a portion of the center area of ​​at least one of the third hinge assembly (250) and the fourth hinge assembly (250-1). As an example, the second center bar (253) may be positioned to cover at least a portion of the center area of ​​each of the third hinge assembly (250) and the fourth hinge assembly (250-1). The first center bar (243) may be fastened and fixed to at least one of the first hinge housing (270), the first hinge assembly (240), or the second hinge assembly (240-1). The second center bar (253) may be fastened and fixed to at least one of the second hinge housing (280), the third hinge assembly (250), or the fourth hinge assembly (250-1).

[0054] Wing plates (261, 262, 263, 264) are coupled with at least one hinge assembly (240, 240-1, 250, 250-1) and arranged to cover at least a portion of the surface in the +z-axis direction of at least one hinge assembly (240, 240-1, 250, 250-1) when the electronic device (200) is in an unfolded state. The wing plates (261, 262, 263, 264) are provided in a form separated from the housings (210, 220, 230). Accordingly, a gap may be formed between the wing plates (261, 262, 263, 264) and the housings (210, 220, 230). Wing plates (261, 262, 263, 264) may include a first wing plate (261) and a second wing plate (262) positioned on both sides with the first center bar (243) in between, and a third wing plate (263) and a fourth wing plate (263) positioned on both sides with the second center bar (253) in between. For example, the first wing plate (261) may be located in the -x-axis direction with respect to the first center bar (243), and the second wing plate (262) may be located in the +x-axis direction with respect to the first center bar (243). The third wing plate (263) may be located in the -x-axis direction with respect to the second center bar (253), and the fourth wing plate (264) may be located in the +x-axis direction with respect to the second center bar (253). Wing plates (261, 262, 263, 264) may be positioned at the same height or on the same xy plane as the first center bar (243) or the second center bar (253) with respect to the z-axis while coupled with the hinge assembly (240, 240-1, 250, 250-1). Wing plates (261, 262, 263, 264) may rotate clockwise or counterclockwise depending on the hinge operation of at least one hinge assembly (240, 240-1, 250, 250-1).For example, while the first wing plate (261) rotates counterclockwise, the second wing plate (262) rotates clockwise, and while the first wing plate (261) rotates clockwise, the second wing plate (262) can rotate counterclockwise. Additionally, while the third wing plate (263) rotates counterclockwise, the fourth wing plate (264) rotates clockwise, and while the third wing plate (263) rotates clockwise, the fourth wing plate (263) can rotate counterclockwise. The first wing plate (261) supports a flat first surface in the third region (203d) of the first display (203) that folds into a dumbbell shape (e.g., a gravity-applied teardrop shape), and the second wing plate (262) can support a flat second surface (e.g., a surface symmetrical to the first surface with respect to the z-axis) in the third region (203d) of the first display (203) that folds into a dumbbell shape. The third wing plate (263) supports a flat third surface in the fifth region (203e) of the first display (203) that folds into a dumbbell shape, and the fourth wing plate (264) can support a flat fourth surface (e.g., a surface symmetrical to the third surface with respect to the z-axis) in the fifth region (203e) of the first display (203) that folds into a dumbbell shape.

[0055] In one embodiment, during the folding process of the electronic device (200), the first housing (210) may be folded before the third housing (230) with respect to the second housing (220), and a narrow hinge (e.g., the first hinge (240) of FIG. 3) may be defined, consisting of a first hinge assembly (240), a second hinge assembly (240-1), a first hinge housing (270), a first center bar (243), a first wing plate (261), and a second wing plate (262). Along with this, a wide hinge (e.g., the second hinge (250) of FIG. 3) may be defined, comprising a third hinge assembly (250), a fourth hinge assembly (250-1), a second hinge housing (280), a second center bar (253), a third wing plate (263), and a fourth wing plate (264). The narrow hinge and the wide hinge may operate substantially identically, and the description provided for either one may be referenced substantially identically or similarly. For convenience of explanation, the following description will focus on the components constituting the narrow hinge, e.g., the first hinge assembly (240), and redundant content may be omitted.

[0056] FIG. 5 is a perspective view showing an example of a hinge assembly of an electronic device according to one embodiment.

[0057] FIG. 6 is a perspective view showing an example of a configuration that generates frictional force of a hinge assembly according to one embodiment. Reference numeral 601 of FIG. 6 shows a part of the first hinge assembly (240) viewed from the +z axis, and reference numeral 602 shows a part of the first hinge assembly (240) viewed obliquely from the +z axis.

[0058] FIG. 7 is an exploded perspective view showing an example of a hinge assembly according to one embodiment.

[0059] In FIGS. 5 to 7, for convenience of explanation, the first hinge assembly (240) among at least one hinge assembly (e.g., the first hinge assembly (240) and the second hinge assembly (240-1) of FIG. 4 is described with the focus on the first hinge assembly (240). The second hinge assembly (240-1) may include a structure and configuration that are substantially identical or similar to the first hinge assembly (240), and the description provided for the first hinge assembly (240) may be referenced in a substantially identical or similar manner.

[0060] Referring to FIGS. 1 to 7, in one embodiment, the first hinge assembly (240) may include a first fixed bracket (530) (e.g., first center bracket), a second fixed bracket (540) (e.g., second center bracket), a first rotating member (510) (e.g., first rotating structure, or first rotating body), a second rotating member (520) (e.g., second rotating structure, or second rotating body), a first link member (310) (e.g., first slide link, first rotating support structure, or first arm link member), a second link member (320) (e.g., second slide link, second rotating support structure, or first rotating link member), a first arm member (410) (e.g., first arm structure, or first arm), and a second arm member (420) (e.g., second arm structure, or second arm).

[0061] According to one embodiment, at least one of the components included in the first hinge assembly (240) may be omitted. For example, when the first rotating member (510) and the second rotating member (520) are directly coupled to the housings (210, 220) and the arm members (410, 420) are coupled to the rotating members (510, 520) and rotate in response to the rotation of the rotating members (510, 520), the first link member (310) and the second link member (320) may be omitted.

[0062] The first hinge assembly (240) may include a plurality of shafts (131, 132, 133, 134), at least one cam member (560, 570) (e.g., cam structure), a first main gear (171), a second main gear (172), at least one interlocking gear (1731, 1732), at least one shaft bracket (710) (e.g., shaft fixing part), at least one gear bracket (610) (e.g., gear fixing part), a first elastic assembly (110), a second elastic assembly (120), a friction bracket (800) (e.g., alignment bracket), a plurality of coupling members (910, 920) (e.g., fixing clips), and a fixing member (670) (e.g., e-ring).

[0063] At least some of the components of the first hinge assembly (240) described above may be provided with a metal material to have a certain level of rigidity. Alternatively, if necessary, the first hinge assembly (240) may be made of reinforced plastic or synthetic resin. According to one embodiment, at least some of the components of the first hinge assembly (240) described above may be omitted or modified. For example, at least some components of the connecting members (910, 920) may be omitted. Alternatively, a specific structure or component of the first hinge assembly (240) may be integrated or combined with another structure or component.

[0064] A first hinge assembly (240) according to one embodiment may include a friction bracket (800) configured to generate a frictional force in the opposite direction of rotation during the rotation of a first arm member (410) and a second arm member (420). A friction bracket (800) according to one embodiment may include a first bracket (810) in which both sides are in contact with and frictionally rubbed against the first arm member (410) and the second arm member (420), respectively, and a second bracket (820) in which one side is in contact with and frictionally rubbed against the first arm member (410) and the second arm member (420), and the other side is in contact with and frictionally rubbed against the first elastic assembly (110).

[0065] A first hinge assembly (240) according to one embodiment may include a first arm member (410) and a second arm member (420) having at least one slit formed therein to increase the surface contacting the friction bracket (800). For example, a first slit (e.g., the first slit (435) of FIG. 8) may be formed in the first arm member (410) so that at least a portion of the first bracket (810) can be fitted together. For example, a second slit (e.g., the second slit (455) of FIG. 10) may be formed in the second arm member (420) so that at least a portion of the first bracket (810) can be fitted together. Due to the formation of the slit and the friction bracket (800), the friction surface (or friction area) that hinders the rotation of the arm members (410, 420) during operation of the first hinge assembly (240) may be increased. The increase in the friction surface may lead to an improvement in the friction force (e.g., resistance force, detent force, or flex force) generated to maintain the folded state of the electronic device (200) at a specific angle. In one embodiment, the slit and friction bracket (800) can contribute to the hinge assembly (e.g., first hinge assembly (240)) providing a constant level of friction so that the electronic device (200) stably maintains a specified folding angle (e.g., 15 degrees, 30 degrees, 45 degrees, 60 degrees, 75 degrees, 90 degrees, 105 degrees, 120 degrees, 135 degrees, 150 degrees, 165 degrees). By utilizing the constant level of friction, various usage environments (e.g., flex mode) that can be implemented at the specified folding angle can be stably provided.

[0066] Below, each component for improving frictional force described above and surrounding components that come into contact with or are combined with them are described.

[0067] The first fixed bracket (530) may include a bracket body (533), a first rail (531) (e.g., a first fixed rail), and a second rail (532) (e.g., a second fixed rail). On one side of the bracket body (533) (e.g., a side wall facing the +y-axis direction), grooves may be formed so that one edge (e.g., a -y-axis edge) of at least one of a first outer shaft (131) (e.g., a first shaft), a second outer shaft (132) (e.g., a second shaft), a first inner shaft (133) (e.g., a third shaft), and a second inner shaft (e.g., a fourth shaft) (134) may be mounted. On one side of the bracket body (533) (e.g., a side wall facing the +y-axis direction), grooves may be formed so that at least one interlocking gear (1731, 1732) may be mounted. In one embodiment, a second fixing bracket (540) may be disposed on one side of the bracket body (533). The second fixing bracket (540) may support the shafts (131, 132, 133, 134) and the interlocking gears (173) from below (e.g., in the -z axis) so that they do not detach from the first fixing bracket (530).

[0068] The first fixed bracket (530) may be seated and fixed on at least a portion of one side of the first hinge housing (270). For example, the first fixed bracket (530) may be fixed to the -y-axis edge or the +y-axis edge of the first hinge housing (270). The first fixed bracket (530) may include a structure (e.g., first rail (531) and second rail (532)) to which a portion of the first rotating member (510) (e.g., first rail structure (511)) and a portion of the second rotating member (520) (e.g., third rail structure (521)) can be rotatably fastened.

[0069] The first rail (531) of the first fixed bracket (530) may be formed with a structure corresponding to the first rail structure (511) of the first rotating member (510), and the second rail (532) may be formed with a structure corresponding to the third rail structure (521) of the second rotating member (520). For example, the first rail (531) and / or the second rail (532) may include a cross section in which at least a portion is formed in an arc shape or a crescent shape from the upper surface (e.g., the surface facing the +z-axis) of the first fixed bracket (530) toward the lower surface (e.g., the surface facing the -z-axis).

[0070] The first rail (531) of the first fixed bracket (530) is positioned offset in the -x axis direction from the second rail (532) with respect to the first axis (e.g., the first axis (101) of FIG. 8) and the second axis (e.g., the second axis (102) of FIG. 10), and the second rail (532) can be positioned offset in the +x axis direction from the first rail (531) with respect to the first axis (101) and the second axis (102).

[0071] According to one embodiment, the first axis (101) and the second axis (102) may be formed apart by a specified distance. According to one embodiment, the distance between the first axis (101) and the second axis (102) may be formed smaller than the distance between the first outer shaft (131) and the second outer shaft (132). According to one embodiment, the first axis (101) and the second axis (102) may be formed above the first outer shaft (131) and the second outer shaft (132) with respect to the z-axis. Alternatively, the first axis (101) and the second axis (102) may be formed closer to the first display (203) than the first outer shaft (131) and the second outer shaft (132) with respect to the z-axis.

[0072] The first rotating member (510) may include a first rotating body (513), a first rail structure (511) extending to one end of the first rotating body (513) (e.g., end in the +x-axis direction), and a second rail structure (512) extending to the other end of the first rotating body (513) (e.g., end in the -x-axis direction). The first rotating body (513) may be positioned between the rail-shaped first rail structure (511) and the second rail structure (512). At least a portion of the first rotating body (513) may be fastened to a first fixed bracket (530). The first rail structure (511) and the second rail structure (512) may be formed with a step difference centered on the first rotating body (513).

[0073] The first rail structure (511) of the first rotating member (510) can be connected to one side of the first fixed bracket (530) (e.g., the first rail (531)) so as to enable hinge movement. The second rail structure (512) of the first rotating member (510) can be connected to one side of the first link member (310) in response to the hinge movement (e.g., rotational movement, or sliding movement) of the first rail structure (511) to perform a sliding movement (e.g., rotational movement, or arc movement). While the first link member (310) connected to the first housing (210) moves according to the movement of the first housing (210), the first rail structure (511) of the first rotating member (510) connected to the first fixed bracket (530) can perform rotational movement in place with respect to the first axis (101). For example, the second rail structure (512) of the first rotating member (510) may rotate (e.g., sliding) within the first link member (310) while moving in one direction (e.g., clockwise while the electronic device (200) is folded from an unfolded state or counterclockwise while the electronic device (200) is unfolded from a folded state). At least a portion of the first wing plate (261) may be fixed to the first rotating member (510). In this regard, the first rotating member (510) may include at least one hole or groove used to be coupled with the first wing plate (261). In one example, the first rotating member (510) may include a hole (515) into which the first axis member (301) is inserted so as to be coupled with the first wing plate (261). The first link member (310) may include rail wings having a hollow space formed in the center and curved surfaces arranged on both sides.

[0074] According to one embodiment, the second rotating member (520) may include a second rotating body (523), a third rail structure (521) extending to the other end of the second rotating body (523) (e.g., the end in the -x axis direction), and a fourth rail structure (522) extending to one end of the second rotating body (523) (e.g., the end in the +x axis direction). The second rotating body (523) may be positioned between the rail-shaped third rail structure (521) and the fourth rail structure (522). At least a portion of the second rotating body (523) may be fastened to the first fixed bracket (530). The third rail structure (521) and the fourth rail structure (522) may be formed with a step difference centered on the second rotating body (523). In one example, the second rotating member (520) may include a hole (525) into which the second shaft member (302) is inserted so as to be coupled with the second wing plate (262).

[0075] The third rail structure (521) can be connected to the other side (e.g., the second rail (532)) of the first fixed bracket (530) to enable hinge movement. The third rail structure (521) can rotate in place with respect to the second axis (102) while the second link member (320) coupled to the second housing (220) moves according to the movement of the second housing (220). According to one embodiment, the third rail structure (521) may include a rail structure similar or identical to the first rail structure (511).

[0076] The fourth rail structure (522) may be coupled to the second link member (320). The fourth rail structure (522) may rotate (e.g., sliding) within the second link member (320) while moving in one direction (e.g., counterclockwise while the electronic device (200) is unfolded and folded, or clockwise while the electronic device (200) is unfolded and unfolded). In this regard, the second link member (320) may include rail wings that have a hollow space formed in the center and curved surfaces positioned on both sides, similar to the first link member (310). According to one embodiment, the fourth rail structure (522) may include a rail structure similar to or identical to the second rail structure (512).

[0077] The second rotating member (520) can move in a direction opposite to the direction of movement of the first rotating member (510). For example, while the first rail structure (511) of the first rotating member (510) rotates in place in a counterclockwise direction, the third rail structure (521) of the second rotating member (520) can rotate in place in a clockwise direction.

[0078] While the electronic device (200) is being folded, the first rail structure (511) of the first rotating member (510) rotates clockwise, and the first link member (310) inserted into the second rail structure (512) can slide counterclockwise along the second rail structure (512). The sliding motion is relative, so the first link member (310) can slide counterclockwise relative to the second rail structure (512).

[0079] While the electronic device (200) is being folded, the third rail structure (521) of the second rotating member (520) rotates counterclockwise along the second rail (532) of the first fixed bracket (530), and the second link member (320) inserted into the fourth rail structure (522) can slide clockwise relative to the fourth rail structure (522).

[0080] According to one embodiment, the first link member (310) may include a structure that is coupled and fixed to one side of the first housing (210). The first link member (310) may include a third rail (311) on which a part of the first rotating member (510) (e.g., a second rail structure (512)) is seated. The first link member (310) may include a first slide mounting portion (312) on which a first slide portion (413) of the first arm member (410) is seated. The first link member (310) may be formed such that its width in the y-axis direction is longer than its width in the x-axis direction to accommodate the third rail (311) and the first slide mounting portion (312). The first link body (313) of the first link member (310) may be fixed to the first housing (210). The third rail (311) may be positioned in one direction (e.g., -y-axis direction) of the first link body (313). The first slide mounting portion (312) may be positioned in the other direction (e.g., +y-axis direction) of the first link body (313). The first slide portion (413) of the first arm member (410) may be seated on the first slide mounting portion (312) to guide the sliding movement of the first slide portion (413).

[0081] According to one embodiment, the second link member (320) may include a structure that is coupled and fixed to one side of the second housing (220). The second link member (320) may include a fourth rail (321) on which a part of the second rotating member (520) (e.g., a fourth rail structure (522)) is seated. The second link member (320) may include a second slide mounting portion (322) on which a second slide portion (423) of the second arm member (420) is seated. The second link member (320) may be formed such that its width in the y-axis direction is longer than its width in the x-axis direction to accommodate the fourth rail (321) and the second slide mounting portion (322). The second link body (323) of the second link member (320) may be fixed to the second housing (220). The fourth rail (321) may be positioned in one direction (e.g., -y-axis direction) of the second link body (323). The second slide mounting portion (322) may be positioned in the other direction (e.g., +y-axis direction) of the second link body (323). The second slide portion (423) of the second arm member (420) may be seated on the second slide mounting portion (322) to guide the sliding movement of the second slide portion (423).

[0082] According to one embodiment, the first arm member (410) may be positioned symmetrically with respect to the second arm member (420) with respect to the y-axis. The first arm member (410) may rotate in the direction from the +z-axis to the -x-axis or from the -x-axis to the +z-axis. The first arm member (410) may include a first arm body (414), a first slide part (413), a first arm part (411), and a third arm part (412). The first arm body (414) may be positioned between the first arm part (411) and the third arm part (412). The first arm part (411) is formed extending from the first arm body (414) in the +x-axis direction and may include a through hole so that the first outer shaft (131) can pass through it. A cam structure that performs a cam operation by contacting one side of the second cam member (570) (e.g., a cam portion formed in the -y-axis direction) may be provided in the surrounding structure forming the through hole. For example, the cam structure of the first arm portion (411) may be formed on a surface facing the second cam member (570) (e.g., a surface in the +y-axis direction of the first arm portion (411)). The third arm portion (412) is formed by extending from the first arm body (414) in the +x-axis direction and may be spaced apart from the first arm portion (411) in the -y-axis direction. The third arm portion (412) may include a through hole so that the first outer shaft (131) can pass through it. The through hole included in the third arm portion (412) and the through hole included in the first arm portion (411) may be in communication with each other. A cam structure that performs a cam operation by contacting one side of the first cam member (560) (e.g., a cam part formed in the -y-axis direction) may be provided in the surrounding structure forming the through hole of the third arm part (412). For example, the cam structure of the third arm part (412) may be formed on a surface facing the first cam member (560) (e.g., a surface in the +y-axis direction of the third arm part (412)). The first slide part (413) may be formed by extending from the first arm body (414) in the -x-axis direction.The first slide portion (413) is connected to the first link member (310) so that the electronic device (200) can perform a sliding motion along the rail wings formed on the first slide mounting portion (312) while performing a hinge motion. The first slide portion (413) may include rail grooves that can be connected to the rail wings formed on the first slide mounting portion (312) of the first link member (310).

[0083] According to one embodiment, the second arm member (420) may be positioned symmetrically with respect to the first arm member (410) with respect to the y-axis. The second arm member (420) may rotate in the direction from the +z-axis to the +x-axis or from the +x-axis to the +z-axis. The second arm member (420) may rotate in the direction opposite to the direction of movement of the first arm member (410). The second arm member (420) may include a second arm body (424), a second arm portion (421), a fourth arm portion (422), and a second slide portion (423). The second arm body (424) may be positioned between the second arm portion (421) and the fourth arm portion (422). The second arm portion (421) is formed by extending from the second arm body (424) in the -x-axis direction and may include a through hole so that the second outer shaft (132) can pass through it. A cam structure that performs a cam operation by contacting one side of the second cam member (570) (e.g., a cam part formed in the -y-axis direction) may be provided in the surrounding structure forming the through hole of the second arm portion (421). For example, the cam structure of the second arm portion (421) may be formed on a surface facing the second cam member (570) (e.g., a surface in the +y-axis direction of the second arm portion (421)). The fourth arm portion (422) is formed by extending from the second arm body (424) in the -x-axis direction and may be spaced apart from the second arm portion (421). The fourth arm portion (422) may include a through hole so that the second outer shaft (132) can pass through it. The through hole included in the fourth arm portion (422) and the through hole included in the second arm portion (421) may be in communication with each other. A cam structure that performs a cam operation by contacting one side of the first cam member (560) (e.g., a cam part formed in the -y-axis direction) may be provided in the surrounding structure forming the through hole of the fourth arm portion (422). For example, the cam structure of the fourth arm portion (422) may be formed on a surface facing the first cam member (560) (e.g., a surface in the +y-axis direction of the fourth arm portion (422)).The second slide portion (423) may be formed by extending in the +x-axis direction from the second arm body (424). The second slide portion (423) is fastened to the second link member (320) so that it can perform a sliding motion along the rail wings formed on the second slide mounting portion (322) while the electronic device (200) performs a hinge motion. The second slide portion (423) may include rail grooves that can be fastened to the rail wings formed on the second slide mounting portion (322) of the second link member (320).

[0084] According to one embodiment, the first outer shaft (131) may have a rod shape in which the length in the y-axis direction is longer than the length in the x-axis or z-axis direction. The first outer shaft (131) may be formed of a metal material to support the inserted components. For example, the first arm portion (411) and third arm portion (412) of the first arm member (410), cam members (560, 570), friction bracket (800), at least one washering, first-1 elastic member (111), second-1 elastic member (121), first shaft bracket (710), first gear bracket (610), and fixing member (670) may be inserted into the first outer shaft (131).

[0085] According to one embodiment, the second outer shaft (132) may have the same or similar shape as the first outer shaft (131). For example, the second shaft (132) may have a rod shape in which the length in the y-axis direction is longer than the length in the x-axis or z-axis direction. The second shaft (132) may be formed of a metal material having a strength greater than a specified size so as to support the inserted components. For example, the second arm portion (421) of the second arm member (420), the fourth arm portion (422), the cam member (560, 570), the friction bracket (800), at least one washering, the first-second elastic member (112), the second-second elastic member (122), the first shaft bracket (710), the first gear bracket (610), and the fixing member (670) may be inserted into the second shaft (132).

[0086] According to one embodiment, the first inner shaft (133) may have the same or similar shape as the first outer shaft (131). For example, the first inner shaft (133) may have a rod shape in which the length in the y-axis direction is longer than the length in the x-axis or z-axis direction. For example, the first inner shaft (133) may have a first interlocking gear (1731), a cam member (560, 570), a friction bracket (800), at least one washer, a first-third elastic member (113), a second-third elastic member (123), a first shaft bracket (710), a first gear bracket (610), and a fixing member (670) inserted therein.

[0087] According to one embodiment, the second inner shaft (134) may have the same or similar shape as the first inner shaft (133). For example, the second inner shaft (134) may have a rod shape in which the length in the y-axis direction is longer than the length in the x-axis or z-axis direction. The second inner shaft (134) may be formed of a metal material having a strength greater than a specified size so as to support the inserted components. For example, the second inner shaft (134) may have a second interlocking gear (1732), a cam member (560, 570), a friction bracket (800), at least one washer, a first-fourth elastic member (114), a second-fourth elastic member (124), a first shaft bracket (710), a first gear bracket (610), and a fixing member (670) inserted therein.

[0088] The first cam member (560) may include a first cam body (565) and at least one first cam portion (561). The first cam member (560) may include a plurality of first cam holes in which at least a portion of each of the first outer shaft (131), the second outer shaft (132), the first inner shaft (133), and the second inner shaft (134) is mounted. Each of the plurality of first cam holes is formed to penetrate the y-axis direction and may be formed at the center of the first cam portion. At least a portion of each of the first outer shaft (131), the second outer shaft (132), the first inner shaft (133), and the second inner shaft (134) may be mounted in the first cam hole after being inserted into the first cam hole of the first cam member (560). The first cam portion may have a cylindrical shape that surrounds the first cam hole formed to penetrate the y-axis direction at the center of the volume. For example, the first cam portion (561) may be positioned to engage with a third cam structure (e.g., the fifth arm surface (4121) of FIG. 8) formed on the third arm portion (412) of the first arm member (410). The first cam portion (561) may have a mountain portion formed in a raised state (e.g., protruding state) in the -y-axis direction and a valley portion located relatively in the +y-axis direction. The top portion of the mountain portion of the first cam portion (561) may be formed higher than the surroundings (e.g., valley portion) and may be formed flat in a direction parallel to the x-axis.

[0089] The second cam member (570) may include a second cam body (575) and at least one second cam portion (571). The second cam member (570) may include a plurality of second cam holes in which at least a portion of each of the first outer shaft (131), the second outer shaft (132), the first inner shaft (133), and the second inner shaft (134) is mounted. Each of the plurality of second cam holes is formed to penetrate the y-axis direction and may be formed at the center of the second cam portion. At least a portion of each of the first outer shaft (131), the second outer shaft (132), the first inner shaft (133), and the second inner shaft (134) may be inserted into the second cam hole of the second cam member (570) and then mounted in the second cam hole. The second cam portion may have a cylindrical shape that surrounds the second cam hole formed to penetrate the y-axis direction at the center of the volume. For example, the second cam portion (571) may be positioned to engage with the first cam structure (e.g., the first arm surface (4311) of FIG. 8) formed on the first arm portion (411) of the first arm member (410). The second cam portion (571) may have a mountain portion formed in a raised state (e.g., protruding state) in the -y-axis direction and a valley portion located relatively in the +y-axis direction, which may be repeatedly arranged. The top portion of the mountain portion of the second cam portion (571) may be formed higher than the surroundings (e.g., valley portion) and may be formed flat in a direction parallel to the x-axis.

[0090] According to one embodiment, the cam member (560, 570) can retract in one direction (e.g., -y-axis direction) in response to the cam structure of the first arm member (410) and the cam member (560, 570) and the cam structure of the second arm member (420) and the cam operation of the cam member (560, 570) while the first arm member (410) and the second arm member (420) rotate within a certain angle range, and then move in the opposite direction (e.g., +y-axis direction) by means of the elasticity of the first elastic assembly (110) and the second elastic assembly (120) when the peaks and valleys of the cams (e.g., cam structure and cam part) engage, and return to the original position.

[0091] According to one embodiment, the first elastic assembly (110) may include a plurality of elastic members (e.g., elastic bodies) having a hollow spring shape at the center. In one example, the first elastic assembly (110) may include a first-1 elastic member (111) and a first-2 elastic member (112) disposed on the outside, and a first-3 elastic member (113) and a first-4 elastic member (114) disposed on the inside. The first elastic assembly (110) may be disposed between the first cam member (560) and the friction bracket (800). The first elastic assembly (110) may act to push the first cam member (560) in one direction (e.g., in the -y-axis direction). Alternatively, in one example, the first elastic assembly (110) may exert an elastic force to push the friction bracket (800) in a direction toward the arm members (410, 420) (e.g., in the +y-axis direction).

[0092] According to one embodiment, the second elastic assembly (120) may include a plurality of elastic members (e.g., elastic bodies) having a hollow spring shape at the center. As an example, the second elastic assembly (120) may include a second-1 elastic member (121) and a second-2 elastic member (122) disposed on the outside, and a second-3 elastic member (123) and a second-4 elastic member (124) disposed on the inside. Since the second elastic assembly (120) is disposed between the second cam member (570) and the first shaft bracket (710), it may act to push the second cam member (570) in one direction. According to one embodiment, the elastic force generated by the second elastic assembly (120) may be similar to the elastic force generated by the first elastic assembly (110) within a certain range.

[0093] The first gear bracket (610) may include insertion holes into which the first outer shaft (131), the second outer shaft (132), the first inner shaft (133), and the second inner shaft (134) are inserted. One side of the first gear bracket (610) (e.g., the side in the -y-axis direction) may be connected to at least a portion of the first fixed bracket (530) (e.g., the side wall in the +y-axis direction). The first gear bracket (610) may be formed to accommodate at least a portion of the shafts (131, 132, 133, 134) so ​​that the shafts can be aligned axially (e.g., in the y-axis direction). At least a portion of the surface of the first gear bracket (610) facing the +y-axis may be in contact with the third arm portion (412), the fourth arm portion (422), and the interlocking gears (173).

[0094] The first shaft bracket (710) may include shaft holes in which a plurality of shafts can be mounted and fixed. The first shaft bracket (710) may include a plurality of shaft holes in which a first outer shaft (131) and a second outer shaft (132) are each mounted and fixed. The shape of at least one of the plurality of shaft holes may be provided in a cylindrical shape that is identical or similar to the cross-section cut along the xz plane of each of the outer shafts (131, 132). In one embodiment, at least a portion of the first shaft bracket (710) may be seated and fixed on one side of the first hinge housing (270). For example, the first shaft bracket (710) may be fixed to the -y-axis edge or the +y-axis edge of the first hinge housing (270). For example, the first shaft bracket (710) may be fixed at a position opposite to where the first fixing bracket (530) of the first hinge housing (270) is fixed. For example, the first shaft bracket (710) may include at least one hole into which a fastening member (e.g., a screw) can be inserted. A fastening member may be inserted into the hole of the first shaft bracket (710) so that the first shaft bracket (710) and the first hinge housing (270) can be at least partially joined.

[0095] According to one embodiment, a first main gear (171) may be disposed on one side of a first outer shaft (131). In one example, the first main gear (171) may be disposed in an integrated form with the third arm portion (412) of the first arm member (410). In one embodiment, a second main gear (172) may be disposed on one side of a second outer shaft (132). In one example, the second main gear (172) may be disposed in an integrated form with the fourth arm portion (422) of the second arm member (420). At least one interlocking gear (1731, 1732) may be disposed between the first main gear (171) and the second main gear (172) and gear-coupled with the first main gear (171) and the second main gear (172). For example, at least one interlocking gear (1731, 1732) may include a first interlocking gear (1731) that is gear-coupled with a first main gear (171) and a second interlocking gear (1732) that is gear-coupled with a second main gear (172). The interlocking gears (173) may be used to share the rotational force of the first outer shaft (131) and the rotational force of the second outer shaft (132). According to one embodiment, the first main gear (171) and the second main gear (172) have been described as having a structure formed on the arm members (410, 420), but the first main gear (171) and the second main gear (172) may be separated from the arm members (410, 420) and arranged separately.

[0096] The interlocking gears (173) may include a first interlocking gear (1731) connected to a first inner shaft (133) and a second interlocking gear (1732) connected to a second inner shaft (134). One end of the first interlocking gear (1731) and the second interlocking gear (1732) (e.g., the end facing the -y-axis) may be in contact with the first gear bracket (610). The other end of the first interlocking gear (1731) and the second interlocking gear (1732) (e.g., the end facing the +y-axis) may be in contact with the first cam member (560). Each of the first interlocking gear (1731) and the second interlocking gear (1732) may include a cam structure arranged to engage with the first cam portion (561) of the first cam member (560). In one embodiment, the interlocking gears (173) may move (e.g., slide) on the inner shafts (133, 134) according to the movement (e.g., movement in the +y-axis or -y-axis direction) of the first inner shaft (133) and the second inner shaft (134). In one embodiment, the interlocking gears (173) may be formed integrally with the first inner shaft (133) and the second inner shaft (134).

[0097] In one embodiment, a fixing member (670) may be disposed between the second elastic assembly (120) and the first shaft bracket (710). The fixing member (670) includes through holes into which the shafts (131, 132, 133, 134) are inserted, and may be at least partially fastened to the shafts so as to maintain the combined state of the first shaft bracket (710) and the shafts. The fixing member (670) may be in the form of, for example, an E-ring.

[0098] In one embodiment, the friction bracket (800) may include a first bracket (810) and a second bracket (820) that are in contact with a first arm member (410) and a second arm member (420). At least a portion of the first bracket (810) may be positioned between the first arm member (410) and the second arm member (420). For example, the portion into which the first inner shaft (133) and the second inner shaft (134) of the first bracket (810) are inserted may be positioned between the first arm portion (411) and the second arm portion (421). The portion into which the first outer shaft (131) of the first bracket (810) is inserted may be received in a first slit (e.g., the first slit (435) of FIG. 8) formed in the first arm portion (411). The portion into which the second outer shaft (132) of the first bracket (810) is inserted may be received in a second slit (e.g., the second slit (455) of FIG. 10) formed in the second arm portion (421). During the rotational operation of the first arm member (410) and the second arm member (420), the portion received in the first slit of the first bracket (810) and the portion received in the second slit may be configured to generate frictional force with the first arm portion (411) and the second arm portion (421). For example, when the first arm member (410) rotates clockwise, as the first arm portion (411) rotates clockwise, a counterclockwise frictional force may be generated on the surface of the first arm portion (411) that contacts the first bracket (810). For example, a frictional force proportional to the force (or normal force) of the first bracket (810) supporting the first arm portion (411) may be applied to the first arm portion (411). At the same time, when the second arm member (420) rotates counterclockwise, a clockwise frictional force may be generated on the surface of the second arm portion (421) that contacts the first bracket (810).

[0099] At least a portion of the second bracket (820) may be positioned between the first arm member (410) and the second arm member (420). For example, the second bracket (820) may be positioned between the first arm body (414) and the second arm body (424). For example, the second bracket (820) may be positioned to be aligned with the first bracket (810) along the y-axis. For example, the portion of the second bracket (820) into which the shafts (131, 132, 133, 134) are inserted may be aligned along the y-axis with the portion of the first bracket (810) into which the shafts are inserted. The through hole into which the shafts of the first bracket (810) are inserted may be parallel along the y-axis with the through hole into which the shafts of the second bracket (820) are inserted. At least a portion of the second bracket (820) may be positioned between the first arm portion (411) and the first elastic assembly (110), and another portion may be positioned between the second arm portion (421) and the first elastic assembly (110). For example, the portion into which the first outer shaft (131) of the second bracket (820) is inserted may be positioned between the first arm portion (411) and the first-1 elastic member (111), and the portion into which the second outer shaft (132) is inserted may be positioned between the second arm portion (421) and the first-2 elastic member (112). The portion into which the first inner shaft (133) and the portion into which the second inner shaft (134) of the second bracket (820) are inserted may be positioned to be aligned along the y-axis with the first-3 elastic member (113) and the first-4 elastic member (114), respectively.

[0100] During the rotational movement of the first arm member (410) and the second arm member (420), the portion positioned between the first arm portion (411) and the first-1 elastic member (111) of the second bracket (820), and the portion positioned between the second arm portion (421) and the first-2 elastic member (112), may be configured to generate frictional force with the first arm portion (411) and the second arm portion (421). For example, when the first arm member (410) rotates clockwise, as the first arm portion (411) rotates clockwise, a counterclockwise frictional force may be generated on the surface of the first arm portion (411) that contacts the second bracket (820). For example, a frictional force proportional to the force (or normal force) of the second bracket (820) supporting the first arm portion (411) may be applied to the first arm portion (411). In addition, when the second arm member (420) rotates counterclockwise, a clockwise frictional force may be generated on the surface of the second arm part (421) that contacts the second bracket (820).

[0101] In one embodiment, a support member (not shown) that supports the first bracket (810) in the +y-axis direction may be disposed in the area between the first bracket (810) and the second bracket (820). For example, the support member may be configured to stably support a portion that does not come into contact with the first arm member (410) and the second arm member (420) of the first bracket (810) (e.g., a portion into which the first inner shaft (133) and the second inner shaft (134) are inserted). For example, the support member may be configured to reinforce the rigidity of the first bracket (810) or the second bracket (820).

[0102] In one embodiment, the coupling structure of each component of at least one hinge assembly (e.g., first hinge assembly (240)) is not limited to the above description and can be formed with various coupling structures. For example, the rail projection (e.g., rail, or rail structure) protruding from one side of the first hinge assembly (240) and the rail groove structure engraved (e.g., recessed) from one side can be formed oppositely to each other. For example, the protruding rail projection formed on the first rotating member (510) can be changed to an engraved rail fixing groove, and correspondingly, the first rail fixing groove (e.g., first rail groove, or first groove) of the first fixing bracket (530) coupled to the first rotating member (510) can be changed to a rail projection of a protruding structure. This structural change can be applied substantially the same or similarly to the combination of at least two of the second rotating member (520), the first fixed bracket (530), the first arm member (410), the second arm member (420), the first link member (310), and the second link member (320).

[0103] FIG. 8 is a drawing showing an example of a first arm member of a hinge assembly according to one embodiment. Reference numerals 801 and 802 of FIG. 8 show an example viewed from different angles in which a first slit (435) is formed in the first arm portion (411) of the first arm member (410).

[0104] FIG. 9 is a drawing showing an example of a first arm member in which a first slit is formed according to one embodiment. FIG. 9 shows the first arm member (410) viewed from the +z axis.

[0105] Referring to FIGS. 7 to 9, in one embodiment, the first arm member (410) may include a first slide portion (413), a first arm body (414), a first arm portion (411), and a third arm portion (412). Regarding the portions of the first arm member (410), the description provided in FIGS. 5 to 7 may be referenced in the same way, and redundant content may be omitted.

[0106] In one embodiment, the first arm portion (411) may include a first extension portion (431), a second extension portion (433), and a first slit (435) formed between the first extension portion (431) and the second extension portion (433). The first extension portion (431) and the second extension portion (433) may extend from the first arm body (414) in the +x-axis direction. For example, the first extension portion (431) and the second extension portion (433) may extend from the first arm body (414) by the same distance from each other. The first extension portion (431) and the second extension portion (433) may be formed spaced apart from each other on the y-axis. For example, the first slit (435) may be defined as a space (or a spaced-out space) between the first extension portion (431) and the second extension portion (433). For example, the first slit (435) may be defined as a recessed portion facing the first arm body (414) of the first arm portion (411) (e.g., -x-axis direction).

[0107] The first extension portion (431) may include a first rock face (4311) facing in one direction (e.g., +y-axis direction) and a second rock face (4312) facing in the opposite direction to the first rock face (4311) (e.g., -y-axis direction). In one example, the first extension portion (431) may include a first rock hole (441) formed by penetrating the first rock face (4311) and the second rock face (4312). For example, at least a portion of the first extension portion (431) may be formed as a hollow cylinder. Alternatively, the first extension portion (431) may be formed as a ring surrounding the first rock hole (441). The first rock hole (441) may have a diameter similar to the diameter of the first outer shaft (131) so that the first outer shaft (131) can be inserted. In one example, the center of the first arm hole (441) may be formed substantially identical to the first axis (101). The first arm surface (4311) may include a first cam structure formed to face the second cam member (570). In one example, the first cam structure may have a shape in which peaks and valleys are repeatedly arranged. The second arm surface (4312) may at least partially contact the surface facing the +y-axis of the first bracket (810) to form a first friction surface.

[0108] The second extension portion (433) may include a third rock face (4331) facing in one direction (e.g., +y-axis direction) and a fourth rock face (4332) facing in the opposite direction to the third rock face (4331) (e.g., -y-axis direction). In one example, the second extension portion (433) may include a second rock hole (443) formed by penetrating the third rock face (4331) and the fourth rock face (4332). At least a portion of the second extension portion (433) (e.g., the structure surrounding the second rock hole (443)) may be formed substantially identically to at least a portion of the first extension portion (431) (e.g., the structure surrounding the first rock hole (441)). For example, the center of the second rock hole (443) may be formed substantially identically to the center of the first rock hole (441) or the first axis (101). The third arm surface (4331) may be in at least partial contact with the surface of the first bracket (810) facing the -y-axis to form a second friction surface. The fourth arm surface (4332) may be in contact with the surface of the second bracket (820) facing the +y-axis to form a third friction surface.

[0109] The third arm portion (412) may include a fifth arm surface (4121) facing in one direction (e.g., +y-axis direction) and a sixth arm surface (4122) facing in the opposite direction to the fifth arm surface (4121) (e.g., -y-axis direction). In one example, the third arm portion (412) may include a third arm hole (445) formed by penetrating the fifth arm surface (4121) and the sixth arm surface (4122). The center of the third arm hole (445) may be formed substantially identical to the center of the first arm hole (441), the center of the second arm hole (443), or the first axis (101). The fifth arm surface (4121) may include a third cam structure formed to face the first cam member (560). In one example, the third cam structure may have a shape in which peaks and valleys are repeatedly arranged. The sixth arm surface (4122) may be in contact with the surface of the gear bracket (610) facing the +y-axis. In one example, a first main gear (171) formed in a gear pattern may be formed on at least a portion of the outer surface of the third arm portion (412). The first main gear (171) may be formed in a shape where peaks and valleys repeat along the circumference of the outer surface. The first main gear (171) may be positioned to mesh with the first interlocking gear (1731). The third arm portion (412) may be formed spaced apart from the second extension portion (433) in the -y-axis direction. A first-1 elastic member (111) and a second bracket (820) may be positioned between the third arm portion (412) and the second extension portion (433).

[0110] In one embodiment, the second extension portion (433) may include a first portion (4333) extending from the first arm body (414) and a second portion (4334) extending from the first portion (4333) and in contact with the first bracket (810) and the second bracket (820). For example, the first portion (4333) may extend from the first arm body (414) in the +x-axis direction, and the second portion (4334) may be formed to extend further from the first portion (4333) in the +x-axis direction.

[0111] In one example, the first part (4333) may be formed to be thinner than the second part (4334). For example, the width of the first part (4333) in the y-axis direction may be smaller than the width of the second part (4334) in the y-axis direction. For example, the first part (4333) may be formed as a flexible hinge (e.g., a living hinge or a flexure hinge) so that the second part (4334) can be bent relative to the first arm body (414). In one example, a protrusion (4335) protruding in the +x-axis direction from the first arm body (414) may be formed. The first part (4333) can be formed with a width smaller than that of the protrusion (4335) and the second part (4334) so ​​as to connect the protrusion (4335) and the second part (4334) while also enabling the bending of the second part (4334).

[0112] As the first slit (435) is formed in the first arm portion (411), the first arm member (410) may be provided with additional friction surfaces and the resulting frictional force. For example, in the case of the third arm portion (412) without a slit, friction surfaces may be formed on two surfaces facing opposite directions (e.g., fifth arm surface (4121), sixth arm surface (4122)), whereas in the case of the first arm portion (411) with the first slit (435) formed, additional friction surfaces (e.g., second arm surface (4312), third arm surface (4331)) formed by the first slit (435) may be included in addition to the two surfaces facing opposite directions (e.g., first arm surface (4311), fourth arm surface (4332)). For example, the first arm member (410) can have its friction area maximized through the first slit (435) without increasing the size of the friction configuration (e.g., the size of the first arm surface (4311), the size of the fourth arm surface (4332), or the diameter of the first-1 elastic member (111).

[0113] In one embodiment, the shape of the first arm member (410) is not limited to the above description and can be formed in various shapes. For example, the first arm member (410) may not include a third arm portion (412) and may include only a first arm portion (411) extending from the first arm body (414). As an example, the first arm member (410) may be configured to include a plurality of slits (e.g., a first slit (435)) to form a plurality of friction surfaces.

[0114] FIG. 10 is a drawing showing an example of a second arm member of a hinge assembly according to one embodiment. Reference numerals 1001 and 1002 of FIG. 10 show an example viewed from different angles in which a second slit (455) is formed in the second arm portion (421) of the second arm member (420).

[0115] Referring to FIGS. 7 to 10, in one embodiment, the second arm member (420) may include a second slide portion (423), a second arm body (424), a second arm portion (421), and a fourth arm portion (422). Regarding the portions of the second arm member (420), the description provided in FIGS. 5 to 7 may be referenced in the same way, and redundant content may be omitted.

[0116] In one embodiment, the second arm portion (421) may include a third extension portion (451), a fourth extension portion (453), and a second slit (455) formed between the third extension portion (451) and the fourth extension portion (453). The third extension portion (451) and the fourth extension portion (453) may extend from the second arm body (424) in the -x-axis direction. For example, the third extension portion (451) and the fourth extension portion (453) may extend from the second arm body (424) by the same distance from each other. The third extension portion (451) and the fourth extension portion (453) may be formed spaced apart from each other on the y-axis. For example, the second slit (455) may be defined as the space (or spaced-out space) between the third extension portion (451) and the fourth extension portion (453). For example, the second slit (455) may be defined as a recessed portion facing the second arm body (424) of the second arm portion (421) (e.g., +x axis direction).

[0117] The third extension portion (451) may include a seventh arm face (4511) facing in one direction (e.g., +y-axis direction) and an eighth arm face (4512) facing in the opposite direction to the seventh arm face (4511) (e.g., -y-axis direction). In one example, the third extension portion (451) may include a fourth arm hole (461) formed by penetrating the seventh arm face (4511) and the eighth arm face (4512). For example, at least a portion of the third extension portion (451) may be formed as a hollow cylinder. Alternatively, the third extension portion (451) may be formed as a ring shape surrounding the fourth arm hole (461). The fourth arm hole (461) may have a diameter similar to the diameter of the second outer shaft (132) so that the second outer shaft (132) can be inserted. In one example, the center of the fourth arm hole (461) may be formed substantially identical to the second axis (102). The seventh arm surface (4511) may include a second cam structure formed to face the second cam member (570). In one example, the second cam structure may have a shape in which peaks and valleys are repeatedly arranged. The eighth arm surface (4512) may at least partially contact the surface of the first bracket (810) facing the +y-axis to form a fourth friction surface.

[0118] The fourth extension portion (453) may include a ninth arm face (4531) facing in one direction (e.g., +y-axis direction) and a tenth arm face (4532) facing in the opposite direction to the ninth arm face (4531) (e.g., -y-axis direction). In one example, the fourth extension portion (453) may include a fifth arm hole (463) formed by penetrating the ninth arm face (4531) and the tenth arm face (4532). At least a portion of the fourth extension portion (453) (e.g., the structure surrounding the fifth arm hole (463)) may be formed substantially identically to at least a portion of the third extension portion (451) (e.g., the structure surrounding the fourth arm hole (461)). For example, the center of the fifth arm hole (463) may be formed substantially identically to the center of the fourth arm hole (461) or the second axis (102). The ninth arm surface (4531) may be in at least partial contact with the surface facing the -y-axis of the first bracket (810) to form a fifth friction surface. The tenth arm surface (4532) may be in contact with the surface facing the +y-axis of the second bracket (820) to form a sixth friction surface.

[0119] The fourth arm portion (422) may include a first arm surface (4221) facing in one direction (e.g., +y-axis direction) and a second arm surface (4222) facing in the opposite direction to the first arm surface (4221) (e.g., -y-axis direction). In one example, the fourth arm portion (422) may include a sixth arm hole (465) formed by penetrating the first arm surface (4221) and the second arm surface (4222). The center of the sixth arm hole (465) may be formed substantially identical to the center of the fourth arm hole (461), the center of the fifth arm hole (463), or the second axis (102). The first arm surface (4221) may include a fourth cam structure formed to face the first cam member (560). In one example, the fourth cam structure may have a shape in which peaks and valleys are repeatedly arranged. The 12th arm surface (4222) may be in contact with the surface of the gear bracket (610) facing the +y-axis. In one example, a second main gear (172) formed in a gear pattern may be formed on at least a portion of the outer surface of the fourth arm portion (422). The second main gear (172) may be formed in a shape where peaks and valleys repeat along the circumference of the outer surface. The second main gear (172) may be positioned to mesh with the second interlocking gear (1732). The fourth arm portion (422) may be formed spaced apart from the fourth extension portion (453) in the -y-axis direction. A first-second elastic member (112) and a second bracket (820) may be positioned between the fourth arm portion (422) and the fourth extension portion (453).

[0120] In one embodiment, the fourth extension portion (453) may include a third portion (4533) extending from the second arm body (424) and a fourth portion (4534) extending from the third portion (4533) and in contact with the first bracket (810) and the second bracket (820). For example, the third portion (4533) may extend from the second arm body (424) in the -x-axis direction, and the fourth portion (4534) may be formed to extend further from the third portion (4533) in the -x-axis direction. In one example, the third portion (4533) may be formed to be thinner in width than the fourth portion (4534). For example, the width in the y-axis direction of the third portion (4533) may be smaller than the width in the y-axis direction of the fourth portion (4534). For example, the third part (4533) may be formed as a flexible hinge (e.g., a living hinge, or a flexure hinge) so that the fourth part (4534) can be bent relative to the second arm body (424).

[0121] As a second slit (455) is formed in the second arm portion (421), additional friction surfaces and the resulting frictional force may be provided to the second arm member (420). For example, in the case of the fourth arm portion (422) without a slit, friction surfaces may be formed on two surfaces facing opposite directions (e.g., the 11th arm surface (4221), the 12th arm surface (4222)), whereas in the case of the second arm portion (421) with the second slit (455) formed, additional friction surfaces formed by the second slit (455) (e.g., the 8th arm surface (4512), the 9th arm surface (4531)) may be included in addition to the two surfaces facing opposite directions (e.g., the 7th arm surface (4511), the 10th arm surface (4532)). For example, the second arm member (420) can maximize the friction area through the second slit (455) without increasing the size of the friction configuration (e.g., the size of the seventh arm surface (4511), the size of the tenth arm surface (4532), or the diameter of the first-second elastic member (112).

[0122] In one embodiment, the shape of the second arm member (420) is not limited to the above description and can be formed in various shapes. For example, the second arm member (420) may not include the fourth arm portion (422) and may include only the second arm portion (421) extending from the second arm body (424). As an example, the second arm member (420) may be configured to include a plurality of slits (e.g., the second slit (455)) to form a plurality of friction surfaces.

[0123] FIG. 11 is a drawing showing an example of a first bracket of a hinge assembly according to one embodiment. Reference numerals 1101 and 1102 of FIG. 11 show the first bracket (810) viewed from different angles.

[0124] Referring to FIGS. 8 through 11, in one embodiment, the first bracket (810) may include a first region (811) in contact with the first arm member (410), a second region (813) in contact with the second arm member (420), and a third region (815) and a fourth region (817) connecting the first region (811) and the second region (813). The first region (811) may be received in a first slit (435) formed in the first arm portion (411). For example, the first region (811) may be located between the first extension portion (431) and the second extension portion (433). The surface (8111) facing the +y-axis of the first region (811) may be in contact with the surface (4312) facing the -y-axis of the first extension portion (431) to form a first friction surface. The surface (8112) facing the -y-axis of the first region (811) may come into contact with the surface (4331) facing the +y-axis of the second extension part (433) to form a second friction surface. The first region (811) may include a hole (811h) formed to allow a first outer shaft (e.g., the first outer shaft (131) of FIG. 7) to be inserted into the center. The hole (811h) of the first region (811) may be formed as a first arm hole (441), a second arm hole (443), a third arm hole (445), or aligned with the first axis (101) along the y-axis. The inner surface (8113) of the first region (811) may have substantially the same diameter as the first outer shaft (131).

[0125] The second region (813) may be received in a second slit (455) formed in the second arm portion (421). For example, the second region (813) may be located between the third extension portion (451) and the fourth extension portion (453). The side (8131) facing the +y-axis of the second region (813) may be in contact with the side (4512) facing the -y-axis of the third extension portion (451) to form a fourth friction surface. The side (8132) facing the -y-axis of the second region (813) may be in contact with the side (4531) facing the +y-axis of the fourth extension portion (453) to form a fifth friction surface. The second region (813) may include a hole (813h) formed in the center to allow a second outer shaft (e.g., the second outer shaft (132) of FIG. 7) to be inserted. The hole (813h) of the second region (813) may be formed to be aligned with the fourth arm hole (461), the fifth arm hole (463), the sixth arm hole (465), or the second axis (102) and the y-axis. The inner surface (8133) of the third region (815) may have substantially the same diameter as the second outer shaft (132).

[0126] In one embodiment, the third region (815) is a region formed between the first region (811) and the second region (813) and may be a region that does not come into contact with the first arm member (410) and the second arm member (420). The fourth region (817) is a region formed between the second region (813) and the third region (815) and may be a region that does not come into contact with the first arm member (410) and the second arm member (420). The third region (815) may include a hole (815h) formed in the center to allow a first inner shaft (e.g., the first inner shaft (133) of FIG. 7) to be inserted. The inner surface (8153) of the third region (815) may have substantially the same diameter as the first inner shaft (133). The fourth region (817) may include a hole (817h) formed in the center to allow the second inner shaft (e.g., the second inner shaft (134) of FIG. 7) to be inserted. The inner surface (8173) of the fourth region (817) may have substantially the same diameter as the second inner shaft (134).

[0127] In one embodiment, the first bracket (810) is formed to be in contact with the first arm member (410) and the second arm member (420) simultaneously, so that it may not rotate together with the first arm member (410) or the second arm member (420). For example, the first bracket (810) may be in a form in which a first region (811) in contact with the first arm member (410) and a second region (813) in contact with the second arm member (420) are connected through a third region (815) and a fourth region (817). The first bracket (810) may be configured so that the regions (811, 813, 815, 817) are at least partially coupled with the shafts (131, 132, 133, 134), so that they do not rotate together in response to the rotation of the first arm member (410) or the second arm member (420).

[0128] In one embodiment, the shape of the first bracket (810) is not limited to the above description and can be formed in various shapes. For example, in one embodiment, at least a portion of the outer surface of the first bracket (810) may be open. For example, at least a portion of the outer surface of the first region (811) may be open and connected to the hole (811h). For example, an opening may be formed in the first region (811). For example, the first region (811) may be formed in the shape of an E-ring. In addition, at least a portion of the outer surface of the second region (813) may be open and connected to the hole (813h), and the second region (813) may be formed in the shape of an E-ring. In one embodiment, the first bracket (810) may be formed in a shape in which the hole (815h) of the third region (815) and the hole (817h) of the fourth region (817) are connected. For example, the first bracket (810) may be formed in a shape in which the third region (815) and the fourth region (817) are integrally formed to include a hollow formed to accommodate the first inner shaft (133) and the second inner shaft (134) in the center. As described above, at least a portion of the outer surface or inner surface of the first bracket (810) may be removed within the range in which contact with the first arm member (410) and the second arm member (420) is maintained, and the weight of the first bracket (810) and the total weight of the first hinge assembly (240) may be reduced.

[0129] In one embodiment, the second bracket (e.g., the second bracket (820) of FIG. 7) may be formed in a shape substantially identical or similar to the first bracket (810). For example, the second bracket (820) may include a first area that contacts the first arm member (410) and the first-1 elastic member (111) to form a third friction surface, a second area that contacts the second arm member (420) and the first-2 elastic member (112) to form a sixth friction surface, a third area connecting the first area and the second area, and a fourth area connecting the second area and the third area. With respect to the second bracket (820), the description provided in relation to the first bracket (810) may be referenced in substantially the same or similar manner, and redundant content may be omitted.

[0130] FIG. 12 is a drawing showing an example of a combined form of a first arm member and a first bracket according to one embodiment.

[0131] FIG. 13 is a drawing illustrating an example of a second extension portion of a first arm member bending according to one embodiment. Reference numeral 1301 of FIG. 13 shows the second portion (4334) of the second extension portion (433) bending downward, and reference numeral 1302 shows the second portion (4334) bending upward.

[0132] Referring to FIGS. 12 and 13, in one embodiment, a first bracket (810) may be disposed between the first extension portion (431) and the second extension portion (433) of the first arm portion (411). At least a portion of the first bracket (810) (e.g., the first region (811) of FIG. 11) may be received in a first slit (435) formed between the first extension portion (431) and the second extension portion (433). In one example, the first width (W1) in the y-axis direction of the first bracket (810) may be formed to be substantially the same as the width (W4) in the y-axis direction of the first slit (435). As the first width (W1) of the first bracket (810) is formed to a size corresponding to the width (W4) in the y-axis direction of the first slit (435), the first bracket (810) can be in close contact with the first extension part (431) and the second extension part (433).

[0133] In one embodiment, the first part (4333) of the second extension part (433) may be formed to be bendable from the first arm body (414) so ​​that the second part (4334) can be moved at least partially toward the first bracket (810) (e.g., +y-axis direction) or toward the second bracket (820) (e.g., -y-axis direction). For example, the first part (4333) may be formed thinner than the second part (4334). For example, the second width (W2) in the y-axis direction of the first part (4333) may be formed smaller than the third width (W3) in the y-axis direction of the second part (4334). For example, the first part (4333) is formed to be significantly thinner than the first arm body (414) and / or the second part (4334) while physically connecting the first arm body (414) and the second part (4334), so that it can be flexibly bent. The first part (4333) may be formed of a material having flexibility to allow for repeated bending, but having a certain level of rigidity so as not to break upon bending. In one embodiment, the second extension part (433) may be formed of substantially the same material as the remaining parts of the first arm member (410) (e.g., the first slide part (413), the first arm body (414), the first extension part (431), the third arm part (412)). For example, the second extension part (433) may be injection-molded integrally with the remaining parts of the first arm member (410). Alternatively, in one example, the second extension portion (433) may be formed by processing (e.g., cutting) a portion of the first arm portion (411) to form the first slit (435).

[0134] The second extension portion (433) can be formed to be movable to a certain extent relative to the first arm body (414) by the formation of the first portion (4333). For example, the second extension portion (433) can be movable to correct the dimensional deviation of the first bracket (810). For instance, if the first width (W1) in the y-axis direction of the first bracket (810) is formed to be smaller than the width (W4) in the y-axis direction of the first slit (435) (hereinafter, in the case of a negative deviation), the first bracket (810) cannot come into contact with the first extension portion (431) and / or the second extension portion (433), so that the first friction surface and the second friction surface may not be formed. Alternatively, if the first width (W1) of the first bracket (810) is formed to be larger than the width (W4) in the y-axis direction of the first slit (435) (hereinafter, in the case of a positive deviation), the first bracket (810) may not be accommodated inside the first slit (435). As the first part (4333) of the second extension part (433) is formed in a living hinge shape that can be bent from the first arm body (414), the first bracket (810) can come into contact with the first extension part (431) and the second extension part (433) even when the negative deviation and the positive deviation occur.

[0135] For example, as illustrated in reference numeral 1301 of FIG. 13, when a positive deviation occurs in the first bracket (810), the second extension part (433) may be bent downwards overall (e.g., in the -y-axis direction). For example, in order to secure additional space to accommodate the first bracket (810) (e.g., space corresponding to the difference between the width in the y-axis direction of the first bracket (810) and the width in the y-axis direction of the first slit (435)), the second part (4334) must be moved in the -y-axis direction, and for this purpose, the first part (4333) and the second part (4334) may be bent toward the second bracket (820). For example, when viewed from the +z-axis, one end of the second part (4334) (e.g., the +x-axis end) may be bent clockwise (R1). As the second extension portion (433) is pushed at least partially toward the second bracket (820), the first bracket (810) may come into contact with the first extension portion (431) to form a first friction surface and come into contact with the second extension portion (433) to form a second friction surface. The second extension portion (433) pushed by the first bracket (810) may come into close contact with the second bracket (820), which is pressed in the +y-axis direction by the first-1 elastic member (111), to form a third friction surface.

[0136] In one embodiment, as illustrated in reference numeral 1302 of FIG. 13, when a negative deviation occurs in the first bracket (810), the second extension part (433) may be bent entirely upward (e.g., in the +y-axis direction). For example, a space may be formed between the first bracket (810) and the second extension part (433) corresponding to the difference between the width of the first slit (435) in the y-axis direction and the width of the first bracket (810) in the y-axis direction. To eliminate the space, the second part (4334) must be moved in the +y-axis direction, and for this purpose, the first part (4333) and the second part (4334) may be bent toward the first bracket (810). For example, when viewed from the +z-axis, one end of the second extension part (433) (e.g., the +x-axis end) may be bent counterclockwise (R2). The bending of the second extension portion (433) can be achieved by the elastic force of the first-1 elastic member (111) transmitted to the second bracket (820). For example, the first-1 elastic member (111) may be compressed and positioned to press the second bracket (820) in the +y-axis direction. The second bracket (820), pressed by the first-1 elastic member (111), may be in close contact with the second extension portion (433) to form a third friction surface. The second extension portion (433) may be in close contact with the first bracket (810) by the elastic force transmitted to the second bracket (820) through the first-1 elastic member (111) to form a first friction surface and a second friction surface.

[0137] The dimensional deviation of the first bracket (810) or the tolerance of the components forming the friction surface (e.g., the first extension part (431), the second extension part (433), the first bracket (810), or the second bracket (820)) can be automatically resolved by the living hinge structure formed by the first part (4333) of the second extension part (433). The second extension part (433) can be bent in a direction toward the first bracket (810) or toward the second bracket (820) with respect to the first arm body (414), and can be in constant contact with the first bracket (810) and the second bracket (820). For example, the deviation of the frictional force by the first bracket (810) and the deviation of the frictional force by the second bracket (820) of the first arm member (410) including the second extension part (433) can be maintained constant.

[0138] In one embodiment, the bending (or deformation) of the second extension part (433) may increase as it moves further away from the first arm body (414). For example, the first part (4333) extending from the first arm body (414) may have a small deformation in the direction parallel to the y-axis, while the second part (4334) may have a relatively large deformation in the direction parallel to the y-axis. In one example, the deformation of the first part (4333) and the second part (4334) may occur within an elastic region where plastic deformation of the second extension part (433) does not occur. For example, the deformation of the first part (4333) and the second part (4334) may occur within a range set so as not to be damaged by repeated bending.

[0139] In one embodiment, the contact surface between the second extension part (433) and the first bracket (810) and the contact surface between the second extension part (433) and the second bracket (820) may be formed as an inclined surface considering the deformation of the second extension part (433). For example, the second part (4334) may deform significantly as it moves away from the first part (4333), and the second part (4334) may come into uneven contact with the first bracket (810) and the second bracket (820). The second part (4334) and the first bracket (810) may include inclined surfaces formed in corresponding shapes to prevent or reduce uneven contact. For example, if a positive deviation occurs in the first bracket (810), one end of the second part (4334) in the +x-axis direction may be deformed in the -y-axis direction, and to compensate for the deformation of the second part (4334), the surface of the second part (4334) facing the +y-axis may be formed with a width in the y-axis direction that is closer to the first part (4333). Since the part of the second part (4334) that is closer to the first part (4333) is formed thicker, even if one end of the +x-axis direction is bent toward the -y-axis, it can be in relatively uniform contact with the surface of the first bracket (810) facing the -y-axis. Alternatively, in one example, if a positive deviation occurs in the first bracket (810), the width of the first bracket (810) in the y-axis direction may be formed thicker as it approaches the +x-axis, and even if one end of the second part (4334) in the +x-axis direction is bent toward the -y-axis, it may be in uniform contact with the surface facing the +y-axis of the second part (4334). The surface facing the -y-axis of the second bracket (820) and the second part (4334) may also include an inclined surface formed in a corresponding shape, and close contact between the second part (4334) and the second bracket (820) may be realized through the inclined surface.

[0140] FIG. 14 is a drawing illustrating an example in which a second extension portion is welded to a first arm member according to one embodiment. FIG. 14 relates to an example in which the second extension portion (433) is formed separately from the first arm member (410), and the description provided in FIG. 5 through FIG. 13 may be referenced substantially the same or similarly with respect to the second extension portion (433) and the remaining portions of the first arm member (410).

[0141] Referring to FIGS. 8 and FIGS. 14, in one embodiment, the second extension portion (433) may be formed separately from the first extension portion (431). For example, after the first extension portion (431) extending from the first arm body (414) is formed, the second extension portion (433) may be formed separately and joined to the first arm body (414). The second extension portion (433) may be formed of the same or a different material as the first arm body (414). Preferably, the second extension portion (433) may be formed of substantially the same material as the first arm body (414) and welded to the first arm body (414). For example, the first portion (4333) and the first arm body (414) may be welded to form a weld (4335). The second part (4334) may be configured to be bent toward the first bracket (810) or the second bracket (820) through the weld (4335) and the first part (4333) which is formed thinner than the second part (4334).

[0142] FIG. 15 is a drawing showing an example of a first arm member of a hinge assembly according to one embodiment. Reference numerals 1501 and 1502 of FIG. 15 show an example of a form in which a second extension portion (433a) is coupled to a first arm member (410a) as viewed from different angles.

[0143] FIG. 16 is a drawing showing an example of a second extension portion of a first arm member according to one embodiment.

[0144] FIG. 17 is a drawing showing an example of a combined form of a first arm member and a second extension part according to one embodiment.

[0145] FIGS. 15 to 17 relate to an example in which a second extension portion (433a) is formed separately from the first arm member (410a), and regarding the remaining parts of the second extension portion (433a) and the first arm member (410a), the description provided regarding the second extension portion (433) and the first arm member (410) in FIGS. 5 to 13 may be referenced substantially the same or similarly.

[0146] Referring to FIGS. 15 to 17, in one embodiment, the first arm member (410a) may include a first slide portion (413a), a first arm body (414a), a first arm portion (411a), and a third arm portion (412a). The first arm portion (411a) may include a first extension portion (431a). The second extension portion (433a) may be formed spaced apart from the first extension portion (431a) along the y-axis. The second extension portion (433a) may be coupled to the first arm body (414a) and extended in a direction parallel to the first extension portion (431a) (e.g., +x-axis direction). A first slit (435a) may be formed between the first extension portion (431a) and the second extension portion (433a) to accommodate at least a portion of the first bracket (e.g., the first bracket (810) of FIG. 11). The second extension portion (433a) may be formed of substantially the same or different material as the first arm body (414a).

[0147] In one embodiment, the second extension portion (433a) may include a first portion (4333a) rotatably coupled to the first arm body (414a) and a second portion (4334a) that contacts the first bracket (810) to form a first friction surface and a second friction surface. For example, the first portion (4333a) may include a contact portion (4335a) that contacts the inner surface (4141a) of the first arm body (414a) (e.g., a surface facing the +x axis) and a locking portion (4336a) that engages and is fixed to the first arm body (414a). The contact portion (4335a) may be formed to extend in a direction perpendicular to the inner surface (4141a) (e.g., along the z-axis). The locking portion (4336a) extending from the contact portion (4335a) may include a locking groove (4337a) formed to engage with a locking projection (4143a) formed on the first arm body (414a).

[0148] The first arm body (414a) may include a first seating portion (4142a) formed by being recessed so that a locking portion (4336a) is seated thereon, and a locking projection (4143a) formed protruding from the first seating portion (4142a). For example, a first seating portion (4142a) may be formed on the surface of the first arm body (414a) facing the -z axis, which is at least partially recessed toward the +z axis. The locking projection (4143a) may be formed protruding from the first seating portion (4142a) toward the inside of the locking groove (4337a) (e.g., in the direction of the -z axis), and the width of the lower portion (4144a) (e.g., the portion adjacent to the first seating portion (4142a)) may be formed to be narrower than that of the upper portion. In one example, the locking groove (4337a) of the locking portion (4336a) may be formed such that the width of the lower portion (4338a) (e.g., the portion adjacent to the first seating portion (4142a)) is wider than the width of the upper portion. The lower portion (4144a) of the locking projection (4143a) may be engaged and fixed with the lower portion (4338a) of the locking groove (4337a), and the combined state of the second extension portion (433a) and the first arm body (414a) may be maintained. For example, as the locking groove (4337a) and the locking projection (4143a) engage along the z-axis, the second extension portion (433a) may not be separated from the first arm body (414a). The second extension part (433a) is fixed to the first arm body (414a) along the z-axis so that it does not detach from the first arm member (410a) when the first arm member (410a) rotates (e.g., from the -x axis to the +z axis, or from the +z axis to the -x axis), and can rotate together with the first arm member (410a).

[0149] In one embodiment, as the second extension portion (433a) is coupled to the first arm member (410a) through the engagement of the locking projection (4143a) and the locking groove (4337a), the rigidity and durability of the second extension portion (433a) and / or the first arm member (410a) can be ensured. For example, since the width of the portion connecting the second extension portion (433a) and the first arm body (414a) does not need to be reduced, the phenomenon of the second extension portion (433a) breaking off from the first arm body (414a) can be prevented or reduced.

[0150] FIG. 18 is a drawing illustrating an example of a method in which a second extension portion is coupled to a first arm member according to one embodiment. Reference numeral 1801 of FIG. 18 shows the second extension portion (433a) being seated on the first arm body (414a), and reference numeral 1802 shows the second extension portion (433a) being coupled to the first arm body (414a).

[0151] FIG. 19 is a drawing illustrating an example of a second extension part bending according to one embodiment. Reference numeral 1901 of FIG. 19 shows the second extension part (433a) rotating downward, and reference numeral 1902 shows the second extension part (433a) rotating upward.

[0152] Referring to FIGS. 15 through 19, in one embodiment, the second extension portion (433a) may be rotatably coupled to the first arm body (414a) with the locking projection (4143a) as the rotation axis (Pa) (or center axis). For example, the locking groove (4337a) of the second extension portion (433a) may be coupled to or separated from the locking projection (4143a) through rotation. For example, the second extension portion (433a) may be positioned on the first arm body (414a) in a state rotated at a predetermined angle with respect to the first arm portion (411a) so that the locking projection (4143a) is seated inside the locking groove (4337a). For example, the locking portion (4336a) of the second extension portion (433a) may be seated on the first seating portion (4142a). After the locking projection (4143a) is received into the locking groove (4337a), the second extension part (433a) can be rotated toward the first arm part (411a). Depending on the rotation of the second extension part (433a), the locking projection (4143a) can be engaged and fixed with the lower part (4338a) of the locking groove (4337a).

[0153] The locking projection (4143a) may be configured as a locking device that secures the second extension part (433a) to the first arm body (414a) along the z-axis. The second extension part (433a) may be configured to move together with the first arm body (414a). For example, the second extension part (433a) may be rotated in response to the rotation of the first arm member (410) which rotates around the first axis (e.g., the first axis (101) of FIG. 8).

[0154] The locking projection (4143a) may be configured as a rotation axis of the second extension part (433a) that rotates clockwise or counterclockwise around the z-axis. The second extension part (433a) may not detach from the first arm member (410) when the first arm member (410) rotates, and at the same time may be rotatably coupled to the first arm member (410) around the locking projection (4143a).

[0155] In one embodiment, the second extension part (433a) may be formed to be movable to a certain extent relative to the first arm body (414a) by means of a locking projection (4143a) formed as a pivot of the second extension part (433a). For example, the second extension part (433a) may be movable to correct a dimensional deviation of the first bracket (810). For example, as illustrated in reference numeral 1901, if a positive deviation of the first bracket (810) occurs, the second extension part (433a) may be pushed in the -y-axis direction by the first bracket (810). The second extension part (433a) may be rotated clockwise (R1) (e.g., clockwise when viewed from the +z-axis) around the locking projection (4143a). The second extension portion (433a) can be brought into contact with the first bracket (810) and the second bracket (e.g., the second bracket (820) of FIG. 7) through clockwise rotation (R1), and the first to third friction surfaces can be formed.

[0156] As illustrated in reference numeral 1902, if a negative deviation occurs in the first bracket (810), the second extension part (433a) may be moved toward the first bracket (810) along the +y-axis. For example, the second extension part (433a) may be pressed in the +y-axis direction by the first-1 elastic assembly (e.g., the first-1 elastic member (111) of FIG. 7) and rotated counterclockwise (R2) around the locking projection (4143a) (e.g., counterclockwise when viewed from the +z-axis). Through the counterclockwise rotation (R2), the second extension part (433a) may come into contact with the first bracket (810) and the second bracket (820), and the first to third friction surfaces may be formed.

[0157] Dimensional deviations of the first bracket (810), or tolerances of the components forming the friction surface (e.g., first extension part (431a), second extension part (433a), first bracket (810), or second bracket (820)) can be automatically resolved by a pivot structure composed of a locking groove (4337a) formed in the first part (4333a) and a locking projection (4143a) of the first arm body (414a). The second extension part (433a) can be rotated relative to the first arm body (414a) in a direction toward the first bracket (810) or toward the second bracket (820), and can be in constant contact with the first bracket (810) and the second bracket (820). For example, the deviation of the frictional force by the first bracket (810) and the deviation of the frictional force by the second bracket (820) of the first arm member (410a) including the second extension part (433a) can be maintained at a constant level.

[0158] FIG. 20 is a drawing showing an example of a first arm member of a hinge assembly according to one embodiment. Reference numerals 2001 and 2002 of FIG. 20 show an example of a form in which a second extension portion (433b) is coupled to the first arm member (410b) as viewed from different angles.

[0159] FIG. 21 is a drawing showing an example of a second extension portion of a first arm member according to one embodiment.

[0160] FIG. 22 is a drawing illustrating the movement of an example of a second extension part according to one embodiment. Reference numeral 2201 of FIG. 22 shows the second extension part (433b) sliding downward, and reference numeral 2202 shows the second extension part (433b) sliding upward.

[0161] Referring to FIGS. 20 to 22, in one embodiment, the first arm member (410b) may include a first slide portion (413b), a first arm body (414b), a first arm portion (411b), and a third arm portion (412b). The first arm portion (411b) may include a first extension portion (431b). The second extension portion (433b) may be formed spaced apart from the first extension portion (431b) along the y-axis. The second extension portion (433b) may be coupled to the first arm body (414b) and extended in a direction parallel to the first extension portion (431b) (e.g., +x-axis direction). A first slit (435b) may be formed between the first extension portion (431b) and the second extension portion (433b) to accommodate at least a portion of the first bracket (e.g., the first bracket (810) of FIG. 11). The second extension portion (433b) may be formed of substantially the same or different material as the first arm body (414b).

[0162] In one embodiment, the second extension portion (433b) may include a first portion (4333b) that is slidably coupled to the first arm body (414b) and a second portion (4334b) that contacts the first bracket (810) to form a first friction surface and a second friction surface. For example, the first portion (4333b) may include a contact portion (4335b) that contacts the inner surface (4141b) of the first arm body (414b) (e.g., a surface facing the +x axis) and a sliding portion (4336b) that is extended parallel to the inner surface (4141b). The contact portion (4335a) may be extended in a direction perpendicular to the inner surface (4141a) (e.g., along the z-axis). The sliding portion (4336b) may be extended parallel to the y-axis. The sliding part (4336b) can be seated on the second seating part (4143b) formed on the first arm body (414b).

[0163] The first arm body (414a) may include a second seating portion (4143b) formed by being recessed so that the sliding portion (4336b) is seated thereon. For example, the second seating portion (4143b) may be formed by recessing at least a portion of the surface (4142b) facing the -z axis of the first arm body (414a) in the +z axis direction. The second seating portion (4143b) may be formed larger than the sliding portion (4336b) so that the sliding portion (4336b) can move in a direction parallel to the y-axis inside. For example, the width of the second seating portion (4143b) in the y-axis direction may be formed larger than the width of the sliding portion (4336b) in the y-axis direction. In one embodiment, the sliding part (4336b) may be configured to form a physical locking structure with the second seating part (4143b) so as not to be separated from the first arm body (414b) along the z-axis. Alternatively, in one embodiment, while the sliding part (4336b) is seated on the second seating part (4143b), a cover member configured to cover the second seating part (4143b) may be attached to the face (4142b) facing the -z-axis of the first arm body (414b). For example, the cover member may be welded to the first arm body (414b) so that the sliding part (4336b) does not detach from the second seating part (4143b) in the direction of the -z-axis. The second extension part (433b) is fixed to the first arm body (414b) along the z-axis so that it does not detach from the first arm member (410b) when the first arm member (410b) rotates (e.g., from the -x axis to the +z axis, or from the +z axis to the -x axis), and can rotate together with the first arm member (410b).

[0164] In one embodiment, as the second extension portion (433b) is coupled to the first arm member (410b) through the engagement of the sliding portion (4336b) and the second seating portion (4143b), the rigidity and durability of the second extension portion (433b) and / or the first arm member (410b) can be ensured. For example, since the width of the portion connecting the second extension portion (433b) and the first arm body (414b) does not need to be reduced, the phenomenon of the second extension portion (433b) breaking off from the first arm body (414b) can be prevented or reduced.

[0165] In one embodiment, the second extension portion (433b) may be slidably coupled to the first arm body (414a) in a first direction (S1) (e.g., -y-axis direction) or a second direction (S2) (e.g., +y-axis direction). For example, through sliding on the second seating portion (4143b) of the sliding portion (4336b), the second extension portion (433b) may be moved relative to the first arm body (414a) in a direction toward the first bracket (810) or toward the second bracket (e.g., the second bracket (820) of FIG. 7).

[0166] In one embodiment, the second extension portion (433b) may be formed to be movable to a certain extent relative to the first arm body (414b) as a whole. For example, the second extension portion (433b) may be movable to correct a dimensional deviation of the first bracket (810). For example, as illustrated in reference numeral 2201, if a positive deviation of the first bracket (810) occurs, the second extension portion (433b) may be pushed by the first bracket (810) in a first direction (S1) (e.g., -y-axis direction). For example, the second extension portion (433b) may be moved in the first direction (S1) as a whole through the sliding of the sliding portion (4336b) in the first direction (S1). The second extension portion (433b) can be moved in the first direction (S1) to a position where it contacts both the first bracket (810) and the second bracket (820), and the first to third friction surfaces can be formed.

[0167] As illustrated in reference numeral 2202, if a negative deviation occurs in the first bracket (810), the second extension part (433b) may be moved toward the first bracket (810) in a second direction (S2) (e.g., +y-axis direction). For example, the second extension part (433b) may be pressed in the second direction (S2) by the first-1 elastic assembly (e.g., the first-1 elastic member (111) of FIG. 7) and may be moved in the second direction (S2) in its entirety through sliding in the second direction (S2) of the sliding part (4336b). The second extension part (433b) may be moved in the second direction (S2) to a position where it contacts both the first bracket (810) and the second bracket (820), and the first to third friction surfaces may be formed.

[0168] The dimensional deviation of the first bracket (810) or the tolerance of the components forming the friction surface (e.g., the first extension part (431b), the second extension part (433b), the first bracket (810), or the second bracket (820)) can be automatically resolved by a sliding structure composed of a sliding part (4336b) formed in the first part (4333b) and a second seating part (4143b) of the first arm body (414b). The second extension part (433b) can be moved in a direction toward the first bracket (810) or toward the second bracket (820) relative to the first arm body (414b), and can be in constant contact with the first bracket (810) and the second bracket (820). For example, the deviation of the frictional force by the first bracket (810) and the deviation of the frictional force by the second bracket (820) of the first arm member (410b) including the second extension part (433b) can be maintained constant.

[0169] In one embodiment, the second extension portion (433b) may be moved entirely parallel to the y-axis to be in close contact with the first bracket (810) and the second bracket (820). For example, the second extension portion (433b) may be formed so that the entire portion is movable along the y-axis, rather than only the second portion (4334b) being bent. As the second extension portion (433b) moves perpendicularly to the surface facing the -y-axis of the first bracket (810) or the surface facing the +y-axis of the second bracket (820), the second portion (4334b) may form a uniform friction surface with the first bracket (810) and the second bracket (820). For example, the surface facing the +y-axis of the second portion (4334b) may overlap with the surface facing the -y-axis of the first bracket (810). For example, the surface facing the -y-axis of the second part (4334b) can overlap with the surface facing the +y-axis of the second bracket (820). Through the sliding drive of the second extension part (433b), the phenomenon of friction or pressure occurring only in a part of the second part (4334b) can be prevented or reduced.

[0170] FIG. 23 is a drawing showing an example of a form of utilization of an electronic device according to one embodiment.

[0171] Referring to FIGS. 1 to 23, in one embodiment, an electronic device (200) comprising at least one hinge assembly (e.g., a first hinge assembly (240)) may provide a usage environment that varies depending on the folding state. For example, the electronic device (200) may include a partial folding state in which a second housing (220) and a third housing (230) are unfolded side by side and the first housing (210) is folded at a predetermined angle relative to the second housing (220) around a first folding axis (F1). For example, in the partial folding state, a video may be played through a first area (203a) of the first display (203), and a handwriting screen may be provided through a second area (203b) and a fourth area (203c). Alternatively, in one example, different screens may be provided in each of the first area (203a), the second area (203b), and the fourth area (203c).

[0172] The electronic device (200) in the partially folded state is supported from the ground through the second housing (220) and the third housing (230), and the first housing (210) can maintain the folded state using the at least one hinge assembly. For example, the components of the first hinge assembly (240) (e.g., the first slit (435) of the first arm member (410), the second slit (455) of the second arm member (420), the first bracket (810), the second bracket (820)) can provide a frictional force in a direction opposite to the force attempting to unfold the first housing (210) (e.g., the repulsive force of the first display (203)).

[0173] In one embodiment, the electronic device (200) may include a partially folded state in which the third housing (230) is folded at a predetermined angle relative to the second housing (220) around the second folding axis (F2). In the partially folded state, the folded state of the third housing (230) may be maintained by at least one hinge assembly (e.g., a third hinge assembly (250)). For example, slits may be formed in the arm members of the third hinge assembly (250), and a bracket may be inserted into the slits to form a friction surface. For example, by the friction surface, a frictional force may be provided to the third housing (230) in a direction opposite to the force attempting to unfold.

[0174] FIG. 24 is a drawing showing an example of a hinge assembly in an unfolded state of an electronic device according to one embodiment. Reference numeral 2401 of FIG. 24 shows the unfolded state of the first hinge assembly (240) as viewed from the +z axis, and reference numeral 2402 shows the unfolded state of the first hinge assembly (240) as viewed obliquely from the +z axis.

[0175] Referring to FIGS. 1 through 24, in one embodiment, the electronic device (200) may have an unfolded state. When the electronic device (200) is in an unfolded state (e.g., when the first display (203) is in an unfolded state, or when the first housing (210) and the second housing (220) are in an unfolded state), the first arm member (410) may be arranged symmetrically with respect to the center of the electronic device (200) with respect to the second arm member (420). The end of the first arm member (410) in the -x-axis direction and the end of the second arm member (420) in the +x-axis direction may be spaced apart by a first distance (e.g., the longest distance).

[0176] According to one embodiment, when the electronic device (200) is in an unfolded state, the normal portion of the first cam structure formed on the first arm portion (411) of the first arm member (410) (e.g., the portion facing the +y-axis) and the normal portion of the second cam member (570) (e.g., the portion facing the -y-axis) may be spaced apart from each other. The normal portion of the third cam structure formed on the third arm portion (412) of the first arm member (410) (e.g., the portion facing the +y-axis) and the normal portion of the first cam member (560) (e.g., the portion facing the -y-axis) may be spaced apart from each other. The normal portion of the second cam structure formed on the second arm portion (421) of the second arm member (420) (e.g., the portion facing the +y-axis) and the normal portion of the second cam member (570) (e.g., the portion facing the -y-axis) may be spaced apart from each other. The normal portion of the fourth cam structure formed on the fourth arm portion (422) of the second arm member (420) (e.g., the portion facing the +y-axis) and the normal portion of the first cam member (560) (e.g., the portion facing the -y-axis) can be spaced apart from each other.

[0177] According to one embodiment, when the electronic device (200) is in an unfolded state, the second elastic assembly (120) may act to push the second cam member (570) in one direction (e.g., -y-axis direction). The second elastic assembly (120) may exert an elastic force to push the second cam member (570) in the direction of the first cam structure and the second cam structure. Due to the elastic force, a first cam friction force may be generated as a part of the second cam member (570) comes into contact with a part of the first cam structure and the second cam structure (460). Due to the elastic force, the first bracket (810) of the friction bracket (800) may come into close contact with the first arm member (410) and the second arm member (420) to form a friction surface.

[0178] According to one embodiment, when the electronic device (200) is in an unfolded state, the first elastic assembly (110) may act to push the first cam member (560) in one direction (e.g., -y-axis direction). The first elastic assembly (110) may exert an elastic force to push the first cam member (560) in the direction of the third cam structure and the fourth cam structure. Due to the elastic force, a second cam friction force may be generated as a part of the first cam member (560) comes into contact with a part of the third cam structure and the fourth cam structure. Due to the elastic force, the second bracket (820) of the friction bracket (800) may come into close contact with the first arm member (410) and the second arm member (420) to form a friction surface. In one embodiment, the electronic device (200) can perform an unfolding operation of the electronic device (200) with less force by utilizing the first cam friction force and the second cam friction force.

[0179] FIG. 25 is a drawing showing an example of a hinge assembly in a partially folded state of an electronic device according to one embodiment. Reference numeral 2501 of FIG. 25 shows the partially folded state of the first hinge assembly (240) as viewed from the +z axis, and reference numeral 2502 shows the partially folded state of the first hinge assembly (240) as viewed obliquely from the +z axis.

[0180] Referring to FIGS. 1 to 25, in one embodiment, when external pressure is applied to an electronic device (200) in an unfolded state, the electronic device (200) may be switched to a folded state at a first angle. For example, the first angle may include any one of an angle between 60 degrees and 120 degrees. In the folded state at the first angle, the end in the -x-axis direction of the first arm member (410) and the end in the +x-axis direction of the second arm member (420) may be separated by a second distance shorter than a first distance (e.g., the longest distance).

[0181] When the electronic device (200) is in a folded state at a first angle, the normal portion of the first cam structure of the first arm member (410) (e.g., the portion facing the +y-axis) and the normal portion of the second cam member (570) (e.g., the portion facing the -y-axis) may be in contact. The normal portion of the third cam structure of the first arm member (410) (e.g., the portion facing the +y-axis) and the normal portion of the first cam member (560) (e.g., the portion facing the -y-axis) may be in contact. The normal portion of the second cam structure of the second arm member (420) (e.g., the portion facing the +y-axis) and the normal portion of the second cam member (570) (e.g., the portion facing the -y-axis) may be in contact. The normal portion of the fourth cam structure of the second arm member (420) (e.g., the portion facing the +y-axis) and the normal portion of the first cam member (560) (e.g., the portion facing the -y-axis) may be in contact.

[0182] While the electronic device (200) changes from an unfolded state to a first angle of folded state, the contact area between the normal portion of the second cam member (570), the normal portion of the first cam structure, and the normal portion of the second cam structure can be gradually increased. The contact area between the normal portion of the first cam member (560), the normal portion of the third cam structure, and the normal portion of the fourth cam structure can be gradually increased. For example, when the electronic device (200) is in a first angle of folded state, the contact areas can be maximized.

[0183] According to one embodiment, when the electronic device (200) is in a folded state at a first angle, the first cam friction force generated by the elastic force of the second elastic assembly (120) may be increased as the contact areas increase. The first cam friction force in the folded state at the first angle may have a larger magnitude than the first cam friction force in the unfolded state. In the folded state at the first angle, the second cam friction force generated by the elastic force of the first elastic assembly (110) may be increased as the contact areas increase. The second cam friction force in the folded state at the first angle may have a larger magnitude than the second cam friction force in the unfolded state.

[0184] According to one embodiment, the electronic device (200) in a first angle of folded state can maintain the mounting angle with greater force by utilizing a first cam friction force and / or a second cam friction force that is increased compared to the unfolded state. The electronic device (200) in a first angle of folded state can provide a stable mounting angle by utilizing a higher friction force than when in the unfolded state. In the first angle of folded state of the electronic device (200), the friction bracket (800) is in close contact with the first arm member (410) and the second arm member (420) to form a friction surface, and the friction force generated from the friction surface can be used together with the first cam friction force and the second cam friction force to maintain the folding angle (e.g., the first angle) of the electronic device (200).

[0185] FIG. 26 is a drawing showing an example of a hinge assembly in a fully folded state of an electronic device according to one embodiment. Reference numeral 2601 of FIG. 26 shows the fully folded state of the first hinge assembly (240) as viewed from the +z axis, and reference numeral 2602 shows the fully folded state of the first hinge assembly (240) as viewed obliquely from the +z axis.

[0186] Referring to FIGS. 1 to 26, in one embodiment, when external pressure is applied to an electronic device (200) in a folded state at a first angle, the electronic device (200) can be switched to a folded state. In the folded state, the end of the first arm member (410) in the -x-axis direction and the end of the second arm member (420) in the +x-axis direction can be separated by a third distance (e.g., shortest distance) that is shorter than the second distance.

[0187] While the electronic device (200) changes from a first angle of folded state to a folded state, the contact area between the normal part of the second cam member (570), the normal part of the first cam structure, and the normal part of the second cam structure can be gradually reduced. The contact area between the normal part of the first cam member (560), the normal part of the third cam structure, and the normal part of the fourth cam structure can be gradually reduced.

[0188] According to one embodiment, when the electronic device (200) is in a folded state, the first cam friction force generated by the elastic force of the second elastic assembly (120) may be reduced as the contact area is reduced. The first cam friction force in the folded state may have a smaller magnitude than the first cam friction force in the folded state at a first angle.

[0189] According to one embodiment, when the electronic device (200) is in a folded state, the second cam friction force generated by the elastic force of the first elastic assembly (110) can be reduced as the contact area is reduced. The second cam friction force in the folded state may have a smaller magnitude than the second cam friction force in the folded state at the first angle.

[0190] In one embodiment, in the folded state, the friction bracket (800) can be in close contact with the first arm member (410) and the second arm member (420) using the elastic force of the first elastic assembly (110) or the elastic force of the second elastic assembly (120).

[0191] An electronic device according to one embodiment disclosed herein comprises at least one hinge assembly (240, 240-1); a first housing (210) coupled to one side of the at least one hinge assembly; and a second housing (220) coupled to the other side of the at least one hinge assembly, wherein the at least one hinge assembly comprises a first arm body (414, 414a, 414b) coupled to the first housing, a first extension portion (431, 431a, 431b) extending from the first arm body, a second extension portion (433, 433a, 433b) extending from the first arm body and formed parallel to the first extension portion, and a first slit (435, 435a, 435b) formed between the first extension portion and the second extension portion; A second arm member (420, 420a, 420b) comprising a second arm body (424, 424a, 424b) coupled to the second housing, a third extension portion (451, 451a, 451b) extending from the second arm body, a fourth extension portion (453, 453a, 453b) extending from the second arm body and formed parallel to the third extension portion, and a second slit (455, 455a, 455b) formed between the third extension portion and the fourth extension portion; a first bracket (810) comprising a first region (811) disposed in the first slit, a second region (813) disposed in the second slit, and a region (815, 817) connecting the first region and the second region; A first elastic member (111) configured to apply pressure to the second extension portion in a direction toward the first region;and a second elastic member (112) configured to press the fourth extension portion in a direction toward the second region, wherein the first region is in close contact with the first extension portion and the second extension portion by the pressure of the first elastic member, and the second region can be in close contact with the third extension portion and the fourth extension portion by the pressure of the second elastic member.

[0192] According to one embodiment disclosed in this document, the third extension portion is extended to face the first extension portion, the fourth extension portion is extended to face the second extension portion, the second extension portion is formed spaced apart from the first extension portion in a first direction and is pressed in a second direction opposite to the first direction by the first elastic member, and the fourth extension portion is formed spaced apart from the third extension portion in the first direction and can be pressed in the second direction by the second elastic member.

[0193] An electronic device according to one embodiment disclosed in this document further comprises: a first shaft (131) inserted through the first extension portion, the first region, the second extension portion, and the first elastic member; and a second shaft (132) inserted through the third extension portion, the second region, the fourth extension portion, and the second elastic member, wherein the first arm member is configured to rotate about the first shaft as an axis, and the second arm member may be configured to rotate about the second shaft as an axis in the opposite direction to the first arm member.

[0194] According to one embodiment disclosed in this document, the first bracket is in contact with the first extension portion to form a first friction surface, and the first bracket is in contact with the second extension portion to form a second friction surface, and when the first arm member is rotated, a frictional force may be applied to the first arm member from the first friction surface and the second friction surface in a direction opposite to the direction of rotation of the first arm member.

[0195] According to one embodiment disclosed in this document, a second bracket (820) is further included, comprising a region disposed between the second extension portion and the first elastic member and a region disposed between the fourth extension portion and the second elastic member, wherein the second bracket contacts the second extension portion to form a third friction surface, and when the first arm member rotates, a frictional force may be applied to the first arm member from the third friction surface in a direction opposite to the direction of rotation of the first arm member.

[0196] According to one embodiment disclosed in this document, the first bracket is in contact with the third extension portion to form a fourth friction surface, the first bracket is in contact with the fourth extension portion to form a fifth friction surface, the second bracket is in contact with the fourth extension portion to form a sixth friction surface, and when the second arm member rotates, a frictional force may be applied to the second arm member from the fourth friction surface, the fifth friction surface, and the sixth friction surface in a direction opposite to the direction of rotation of the second arm member.

[0197] According to one embodiment disclosed in this document, the second extension portion includes a first portion (4333, 4333a, 4333b) connected to the first arm body and a second portion (4334, 4334a, 4334b) in contact with the first bracket, the first portion and the second portion are integrally formed with the first arm body and contain the same material, and the second portion can be pressed in the second direction by the first elastic member.

[0198] According to one embodiment disclosed in this document, the width of the first part (4333) is formed to be smaller than the width of the second part so that the second part (4334) can be deformed in the first direction or the second direction relative to the first arm body (414), and the deformation of the second part may occur more significantly as it moves away from the first part.

[0199] According to one embodiment disclosed in this document, the thickness in the first direction of the second part (4334) decreases as it moves away from the first part (4333), and the thickness in the first direction of the part received in the first slit (435) of the first bracket may increase as it moves closer to the first part.

[0200] According to one embodiment disclosed in this document, the second extension portion (433, 433b) is formed of a material different from the first arm body (414, 414b) and the first extension portion (431, 431b), and the second extension portion may be joined to the first arm body by welding.

[0201] According to one embodiment disclosed in this document, the second extension portion (433a) comprises a first portion (4333a) rotatably coupled to the first arm body (414a) and a second portion (4334a) that frictionally contacts the first bracket, the first portion comprises a locking portion (4336a) having a locking groove (4337a) formed therein, the first arm body comprises a first seating portion (4142a) that is recessed to receive the locking portion and a locking projection (4143a) that protrudes from the first seating portion toward the inside of the locking groove, the locking projection is configured to function as a rotation axis of the second extension portion relative to the first arm body, and the locking projection is coupled in a direction parallel to the locking groove and the rotation axis so that the second extension portion and the first arm body rotate together when the first arm member (410a) rotates, and the second portion is in the second direction by the first elastic member. It can be pressurized.

[0202] According to one embodiment disclosed in this document, the second extension portion (433b) includes a first portion (4333b) that is slidably coupled to the first arm body (414b) and a second portion (4334b) that is in contact with the first bracket, the first portion includes a sliding portion (4336b) that extends parallel to the first direction, the first arm body includes a second seating portion (4143b) that is formed as a recess to accommodate the sliding portion, the width of the second seating portion in the first direction is formed to be larger than the width of the sliding portion in the first direction, the sliding portion is configured to be movable in the first direction or the second direction on the second seating portion, and the second portion can be pressed in the second direction by the first elastic member.

[0203] According to one embodiment disclosed in this document, a cover member is disposed on a surface opposite to the surface of the sliding part that contacts the second seating part, and the cover member may be welded to the first arm body so as not to detach the sliding part from the second seating part.

[0204] According to one embodiment disclosed in this document, the first bracket may include a first opening formed by opening a portion of its outer surface to allow the first shaft to be inserted, and a second opening formed by opening a portion of its outer surface to allow the second shaft to be inserted.

[0205] According to one embodiment disclosed in this document, a support member is disposed between the first bracket and the second bracket, and the support member may be configured to support the first bracket in the second direction.

[0206] A hinge assembly according to one embodiment disclosed in this document comprises: a first arm body (414, 414a, 414b), a first extension portion (431, 431a, 431b) extending from the first arm body, a second extension portion (433, 433a, 433b) extending from the first arm body and formed parallel to the first extension portion, and a first slit (435, 435a, 435b) formed between the first extension portion and the second extension portion; A second arm member (420, 420a, 420b) comprising a second arm body (424, 424a, 424b), a third extension portion (451, 451a, 451b) extending from the second arm body, a fourth extension portion (453, 453a, 453b) extending from the second arm body and formed parallel to the third extension portion, and a second slit (455, 455a, 455b) formed between the third extension portion and the fourth extension portion; a first bracket (810) comprising a first region (811) disposed in the first slit, a second region (813) disposed in the second slit, and a region (815, 817) connecting the first region and the second region; and a first elastic member (111) configured to press the second extension portion in a direction toward the first region. and a second elastic member (112) configured to press the fourth extension portion in a direction toward the second region, wherein the first region is in close contact with the first extension portion and the second extension portion by the pressure of the first elastic member, and the second region can be in close contact with the third extension portion and the fourth extension portion by the pressure of the second elastic member.

[0207] According to one embodiment disclosed in this document, the first region is in contact with the first extension portion and the second extension portion to form a friction surface, and the second region is in contact with the third extension portion and the fourth extension portion to form a friction surface, and a frictional force is applied to the first arm member in a direction opposite to the rotational direction of the first arm member by the friction surface formed from the first region, and a frictional force is applied to the second arm member in a direction opposite to the rotational direction of the second arm member by the friction surface formed from the second region.

[0208] According to one embodiment disclosed in this document, the second extension portion (433) includes a first portion (4333) that extends from the first arm body (414) and is spaced apart from the first bracket and the first elastic member, and a second portion (4334) that extends from the first portion and is in contact with the first bracket and the first elastic member, wherein the first portion may be formed thinner than the second portion so that the second extension portion can be bent at least partially with respect to the first arm body.

[0209] According to one embodiment disclosed in this document, the second part is at least partially deformed by the pressure of the first elastic member, and the amount of deformation of the second part may increase as it moves further away from the first part.

[0210] According to one embodiment disclosed in this document, the thickness of the second portion may decrease as it moves away from the first portion to offset at least a portion of the deformation amount, and the thickness of the portion of the first bracket corresponding to the second portion may increase as it moves closer to the first portion to offset at least a portion of the deformation amount.

Claims

1. In an electronic device, At least one hinge assembly (240, 240-1); A first housing (210) coupled to one side of the above at least one hinge assembly; and It includes a second housing (220) coupled to the other side of the above-mentioned at least one hinge assembly, and The above at least one hinge assembly is, A first arm member (410, 410a, 410b) comprising a first arm body (414, 414a, 414b) coupled to the first housing, a first extension portion (431, 431a, 431b) extending from the first arm body, a second extension portion (433, 433a, 433b) extending from the first arm body and formed parallel to the first extension portion, and a first slit (435, 435a, 435b) formed between the first extension portion and the second extension portion; A second arm member (420, 420a, 420b) comprising a second arm body (424, 424a, 424b) coupled to the second housing, a third extension portion (451, 451a, 451b) extending from the second arm body, a fourth extension portion (453, 453a, 453b) extending from the second arm body and formed parallel to the third extension portion, and a second slit (455, 455a, 455b) formed between the third extension portion and the fourth extension portion; A first bracket (810) comprising a first area (811) disposed in the first slit, a second area (813) disposed in the second slit, and areas (815, 817) connecting the first area and the second area; A first elastic member (111) configured to apply pressure to the second extension portion in a direction toward the first region; and It includes a second elastic member (112) configured to apply pressure to the fourth extension portion in a direction toward the second region, and The first region is in close contact with the first extension portion and the second extension portion by the pressure of the first elastic member, and The electronic device, wherein the second region is in close contact with the third extension portion and the fourth extension portion by the pressure of the second elastic member.

2. In Claim 1, The third extension portion is extended to face the first extension portion, and The above-mentioned fourth extension portion is extended to face the above-mentioned second extension portion, and The second extension portion is formed spaced apart from the first extension portion in a first direction and is pressed in a second direction opposite to the first direction by the first elastic member, An electronic device in which the fourth extension portion is formed spaced apart from the third extension portion in the first direction and is pressed in the second direction by the second elastic member.

3. In Claim 2, A first shaft (131) inserted through the first extension portion, the first region, the second extension portion, and the first elastic member; and It further includes a second shaft (132) inserted through the third extension portion, the second region, the fourth extension portion, and the second elastic member. The first arm member is configured to rotate about the first shaft as an axis, and An electronic device in which the second arm member is configured to rotate in the opposite direction to the first arm member with the second shaft as the axis.

4. In Claim 3, The first bracket above contacts the first extension part to form a first friction surface, and The first bracket above contacts the second extension part to form a second friction surface, and An electronic device in which, when the first arm member is rotated, a frictional force is applied to the first arm member from the first friction surface and the second friction surface in a direction opposite to the rotational direction of the first arm member.

5. In Claim 4, It further includes a second bracket (820) comprising an area disposed between the second extension portion and the first elastic member and an area disposed between the fourth extension portion and the second elastic member, and The second bracket above contacts the second extension part to form a third friction surface, and An electronic device in which, when the first arm member is rotated, a frictional force is applied to the first arm member from the third friction surface in a direction opposite to the rotational direction of the first arm member.

6. In Claim 5, The first bracket above contacts the third extension part to form a fourth friction surface, and The first bracket above contacts the fourth extension part to form a fifth friction surface, and The second bracket above contacts the fourth extension part to form a sixth friction surface, and An electronic device in which, when the second arm member is rotated, a frictional force is applied to the second arm member from the fourth friction surface, the fifth friction surface, and the sixth friction surface in a direction opposite to the direction of rotation of the second arm member.

7. In Claim 2, The second extension portion includes a first portion (4333, 4333a, 4333b) connected to the first arm body and a second portion (4334, 4334a, 4334b) in friction with the first bracket, The first part and the second part are formed integrally with the first arm body and include the same material, The above second part is an electronic device that is pressed in the second direction by the above first elastic member.

8. In Claim 7, The width of the first part (4333) is formed to be smaller than the width of the second part so that the second part (4334) can be deformed in the first direction or the second direction relative to the first arm body (414), and An electronic device in which deformation of the second part above occurs more significantly as it moves away from the first part.

9. In Claim 8, The thickness of the first direction of the second part (4334) decreases as it moves away from the first part (4333), and An electronic device in which the thickness of the portion received in the first slit (435) of the first bracket in the first direction increases as it approaches the first portion.

10. In Claim 2, The second extension portion (433, 433b) is formed of a material different from the first arm body (414, 414b) and the first extension portion (431, 431b), and The above second extension part is joined to the above first arm body by welding, an electronic device.

11. In Claim 2, The second extension portion (433a) comprises a first portion (4333a) rotatably coupled to the first arm body (414a) and a second portion (4334a) that frictionally contacts the first bracket. The above first part includes a locking part (4336a) in which a locking groove (4337a) is formed, and The first arm body includes a first seating portion (4142a) that is recessed to receive the locking portion, and a locking projection (4143a) that protrudes from the first seating portion toward the inside of the locking groove. The above locking projection is configured to function as a rotation axis of the second extension portion relative to the first arm body, and The locking projection is engaged in a direction parallel to the locking groove and the rotation axis so that the second extension part and the first arm body rotate together when the first arm member (410a) rotates, and The above second part is an electronic device that is pressed in the second direction by the above first elastic member.

12. In Claim 2, The second extension portion (433b) includes a first portion (4333b) that is slidably coupled to the first arm body (414b) and a second portion (4334b) that frictionally contacts the first bracket. The first part includes a sliding part (4336b) that extends parallel to the first direction, and The first arm body includes a second seating portion (4143b) formed by a recess so that the sliding portion is seated thereon, and The width of the first direction of the second seating portion is formed to be larger than the width of the first direction of the sliding portion, and The sliding portion is configured to be movable in the first direction or the second direction on the second seating portion, and The above second part is an electronic device that is pressed in the second direction by the above first elastic member.

13. In Claim 12, A cover member is disposed on the surface opposite to the surface contacting the second seating portion of the above sliding portion, and The above cover member is welded to the first arm body so as not to detach the sliding part from the second seating part, in an electronic device.

14. In Claim 3, The electronic device comprising: a first bracket having a first opening formed by opening a portion of its outer surface to allow the first shaft to be inserted, and a second opening formed by opening a portion of its outer surface to allow the second shaft to be inserted.

15. In Claim 5, A support member is disposed between the first bracket and the second bracket, and An electronic device in which the above-mentioned support member is configured to support the above-mentioned first bracket in the above-mentioned second direction.

Images